We provide biomolecules practice exercises, instructions, and a learning material that allows learners to study outside of the classroom. We focus on biomolecules skills mastery so, below you will get all questions that are also asking in the competition exam beside that classroom.
List of biomolecules Questions
| Question No | Questions | Class |
|---|---|---|
| 1 | Match the pairs correctly. | 12 |
| 2 | Invert sugar is A. leavorotatory B. dextrorotatory C . optically inactive D. racemic mixture |
12 |
| 3 | Which substance is not present in nucleic acids? A. Cytosine B. Adenine c. Thymine D. Guanidine |
12 |
| 4 | Which among the following is not the example of carbohydrate? A. Glucose B. fractose c. Maltose D. Nylon |
12 |
| 5 | Formation of glycogen from glucose is an example of A. Catabolism B. Polymerisation c. Dehydration synthesis D. Anabolism |
11 |
| 6 | For the given DNA sequence, the complementary mRNA sequence is given as below ( mathbf{5}^{prime} boldsymbol{C G T A C G T A 3}^{prime} ) A . ( 3^{prime} U C U A U G A A 5^{prime} ) B. ( 3^{prime} )TACATAGA ( 5^{prime} ) c. ( 3^{prime} G C A U G C A U 5 ) D. 3’UACAAGGA5′ E . ( 3^{prime} ) ATGTCCTT5 |
11 |
| 7 | DNA is directly involved in the synthesis except that of A. DNA B. Protein c. tRNA D. mRNA |
11 |
| 8 | Are the polysaccharides sweet like sugars? | 11 |
| 9 | The vitamin which maintain the redox potentials of cells is: A. folic acid B. ascorbic acid c. pyridoxine D. calciferol |
12 |
| 10 | Hydrolysis of sucrose gives: A. Glucose and Galactose B. Maltose and Glucose c. Galactose and Fructose D. None of the above |
12 |
| 11 | Which of the following is a coenzyme? A. NAD B. NADP c. FAD D. All the above |
11 |
| 12 | The hormone that promotes anabolism and inhibits catabolism is the A. tri iodo Thyroxine B. auxins c. insulin D. morphactin |
12 |
| 13 | Nucleic acids were discovered by A. Watson and Crick B. Khorana c. wilkins D. Miescher |
11 |
| 14 | Who proposed the double helical structure of the DNA? |
11 |
| 15 | Vitamin C must be supplied regularly in diet because? A. it is water soluble hence excreted in urine and can’t be stored in the body B. it is fat soluble hence stored in the body and cannot be used on regular basis C. it is required in a large amount by the body hence supplied regularly D. it is water soluble hence used by the body on daily basis and is to be suppled regularly |
12 |
| 16 | Structure of Guanine is ( A ) B. ( c ) D. None |
12 |
| 17 | Polypeptides having molecular weights above 10000 are known as: A. Amino acids B. Hormones c. Proteins D. Terminal amino acids |
12 |
| 18 | The molecular formula of sucrose is A. ( C_{10} H_{22} O_{11} ) B. ( C_{12} H_{22} O_{11} ) c. ( C_{13} H_{22} O_{11} ) D. ( C_{12} H_{22} O_{10} ) |
12 |
| 19 | 33. Polysaccharides have ——– linkages. (a) glycosidic (b) anomeric (c) epimeric (d) polymorphic |
11 |
| 20 | Fructose is obtained from sweet fruits and honey. A . True B. False |
12 |
| 21 | Q. 41 During curdling of milk, what happens to sugar present in it? | 11 |
| 22 | Number of chiral centers in maltose are | 12 |
| 23 | The melting points and solubility in water of amino acids are generally higher than of corresponding halo acids. | 12 |
| 24 | The number of H bonds between guanine and cytosine are A. one B. Two c. Three D. Four |
11 |
| 25 | Deficiency of insulin in human beings causes: A. Blood coagulation B. Beri Beri c. Diabetes D. Dermatitis |
12 |
| 26 | Hormones are secreted by ductless glands of human body. lodine containing hormone is: A. testosterone B. adrenaline c. thyroxine D. insulin |
12 |
| 27 | For a polymerization reaction: ( 6 H C H O rightleftharpoons C_{6} H_{12} O_{6} ) degree of association was found to be 0.96 Calculate mean mass of mixture at equilibrium. Report value of mean molar mass of mixture dividing by 50 |
12 |
| 28 | Conversion of glucose to pyruvate is a A. Anabolic reaction B. Catabolic reaction c. Anabolic and catabolic reaction D. None of the above |
11 |
| 29 | A nucleotide base present in RNA but absent in DNA is A . Uraci B. Adenine c. cytosine D. Thymine E. Guanine |
11 |
| 30 | In which of the following compound, all the monosaccharide units are not joined by only ( C_{1}-O-C_{4} ) chain? A . Lactos B. Maltose c. cellulose D. Amylopectin |
12 |
| 31 | Inorganic cofactor is often called A. Coenzyme B. Prosthetic group c. Modulator D. Activator |
11 |
| 32 | Which type of Linkage is present in amylopectin? A ( cdot alpha-D- ) Glucose ( , C_{1}-C_{4} & C_{2}-C_{6} ) B . ( alpha-D- ) Glucose, ( C_{1}-C_{4} ) & ( C_{1}-C_{6} ) c. ( beta-D- ) Glucose ( , C_{1}-C_{4} ) & ( C_{2}-C_{6} ) D. ( beta-D- )Glucose( , C_{1}-C_{4} & C_{1}-C_{6} ) |
12 |
| 33 | Tophayo Jy d-helix is a secondary structure of proteins formed by twisting of polypeptide chain into right handed screw like structure. Which type of interactions are responsible for making the a-helix structure stable? Ane boli |
11 |
| 34 | 0.55 Describe the term D- and L-configuration used for amino acids with examples. hoino) are optically active due to the |
12 |
| 35 | Identify the correct statement regarding enzyme inhibition. A. Non-competitive inhibition of an enzyme can be overcomed by adding large amount of substrate. B. Competitive inhibition is seen when a substrate competes with an enzyme for binding to an inhibitor protein. C. Competitive inhibition is seen when the substrate and the inhibitor compete for the active site on the enzyme. D. Non-competitive inhibitors often bind to the enzyme irreversibly. |
11 |
| 36 | In which process under metabolism energy is liberated because of respiration? A. Catabolism B. Anabolism c. Excretion D. Digestion |
11 |
| 37 | UUUU. 93. In an alkaline medium, glycine predominantly exists as/in a/an (a) cation (b) anion (c) zwitter ion (d) covalent form. Lorella |
11 |
| 38 | Starch and cellulose are the compounds made up of many units of A. simple sugar B. Fatty acid c. Glycerol D. Amino acid |
11 |
| 39 | Assertion A solution of sucrose in water is dextrorotatory while on hydrolysis in presence of little hydrochloric acid, becomes laevorotatory. Reason Sucrose on hydrolysis give unequal amounts of glucose and fructose as result of which change in sign of rotation observed. A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion C. Assertion is correct but Reason is incorrect D. Both Assertion and Reason are incorrect |
12 |
| 40 | All of the given nitrogenous bases are found in DNA except A. Adenine B. Guanine c. Thymine D. Cytosine E. Uraci |
11 |
| 41 | The hypothalamus regulates: A. heart rate B. glandular secretions c. body temperature D. all of the above |
12 |
| 42 | Which among the following are essential chemical components of many coenzymes? A. Nucleic acids B. Carbohydrates c. Vitamins D. Proteins |
11 |
| 43 | Glycogen is stored in A . Liver B. Muscles c. Pancreas D. Liver and muscles |
11 |
| 44 | What are hormones? Write the structure of simple triglycerides. |
12 |
| 45 | Number of peptide bonds present in Ala-Gly-Ser-Tyr A . 4 B. 3 ( c cdot 2 ) ( D ) |
12 |
| 46 | Question 1. Name the sugar present in milk. How man monosaccharides units are present in it? What are such oligosaccharides called? |
12 |
| 47 | Q. 36 Aldopentoses named as ribose and 2-deoxyribose are found in nucleic acids. What is their relative configuration? |
11 |
| 48 | Nucleic acids are polymers of: A. Nucleotides B. Nucleosides c. Nuclei of heavy metals D. Proteins |
12 |
| 49 | a) What is denaturation of proteins? b) What are essential Amino Acids? Give one example. |
12 |
| 50 | Which of the following is not produced by human body? A. Enzymes B. Vitamins c. Proteins D. Nucleic acid |
12 |
| 51 | 37. Which one of the following statements is not true regarding (+) lactose? (a) On hydrolysis (+) lactose gives equal amount of D(+) glucose and D(+) galactose. (b) (+) Lactose is a B-glucoside formed by the union of a molecule of D(+) glucose and a molecule of D(+) galactose. (c) (+) Lactose is a reducing sugar and does not exihibit mutarotation. (d) (+) Lactose, C12H22011 contains 8-OH groups. (AIPMT) |
11 |
| 52 | The destruction of the biological nature and activity of proteins by heat or chemical agent is called as: A. dehydration B. denaturation c. denitrogenation D. deammination |
12 |
| 53 | The segment of DNA which acts as the instrumental manual for the synthesis of the protein is: A . ribose B. gene c. nucleoside D. nucleotide |
12 |
| 54 | Select the correct match: A. T. H. Morgan – Transduction B. Ribozyme – Nucleic acid C. G. Mendel – Transformation D. ( F_{2} times ) Recessive parent – Dihybrid cross |
11 |
| 55 | Pick out the one which does not belong to the family. A. Pepsin B. Cellulose c. Ptyalin D. Lipase |
12 |
| 56 | The source of folic acid is: A. yeast B. spinach leaf C. liver of ox D. all of the above |
12 |
| 57 | Value based questions. Try to explain the following observations When ( K^{+} ) ions are removed from the medium surrounding red blood cells, sodium influx into the cells and potassium efflux increase dramatically. |
11 |
| 58 | 23 93. In an alkaline medium, glycine predominantly exists as/in a/an (a) cation (b) anion (c) zwitter ion (d) covalent form. |
11 |
| 59 | Bond present between two residues of carbohydrate is A. Amide B. Phosphodiester c. Glycosidic D. Hydrogen bond |
11 |
| 60 | Which component of starch is a branched polymer of ( alpha ) -glucose and insoluble in water? | 12 |
| 61 | 0.50 How do you explain the presence of an aldehydic group in a glucose molecule? |
11 |
| 62 | Wilkins X-ray diffraction showed the diameter of the DNA helix is B. 20 ( dot{A} ) ( c .30 dot{A} ) D. 40 a |
11 |
| 63 | L. 40 Some enzymes are named after the reaction, where they are used. What name is given to the class of enzymes which catalyse the oxidation of 20 one substrate with simultaneous reduction of another substrate? |
12 |
| 64 | One cyclic acetal form of D-galactose is shown Which atom is the anomeric carbon? ( mathbf{A} cdot ) Atom ( A ) B. Atom B c. Atom ( c ) D. Atom D E. Atom E ( F . ) Atom ( F ) |
12 |
| 65 | Organisms undergo processes that require energy and produce energy. Processes such as photosynthesis, cellular respiration, reproduction, and movement are just a few of these processes. Which of these best describes the energy available to do cellular work? A. Heat B. Free energy c. Potential energy D. Kinetic energy |
11 |
| 66 | 2.28 Which of the following terms are correct about enzyme? (a) Proteins (b) Dinucleotides (c) Nucleic acids (d) Biocatalysts |
11 |
| 67 | Which one is the most abundant protein in the animal world A. Trypsin B. Haemoglobin c. collagen D. Insulin |
12 |
| 68 | The presence or absence of hydroxyl group on which carbon atom of sugar differentiates RNA and DNA ? A . ( 1 s t ) B. 2nd ( c .3 r d ) D. 4 th |
12 |
| 69 | Which of the following complementary base pairing does not exist? A. A DNA adenine to a DNA thymine B. A DNA adenine to an RNA thymine C. A DNA guanine to an RNA cytosine D. A DNA adenine to an RNA uracil E. A DNA guanine to a DNA cytosine |
11 |
| 70 | Which of the following compounds is found abundantly in nature? A. Fructose B. Starch c. Glucose D. Cellulose |
12 |
| 71 | Match the list – I (enzymes) with List – II (metals) and select the correct answer using the codes given below the lists: List List – II A. Nitrogenase 1. ( c ) B. Cytochrome oxidase 2. Mo c. cytochrome- ( c ) 3. zn D. carboxypeptidase 4. Fe A. A-1 B-2 C-4 D-3 B. A-2 B-1 C-3 D-4 c. ( A-2 B-1 C-4 D-3 ) D. A-1 B-2 C-3 D-4 |
12 |
| 72 | 61. The anomeric carbon in D (+) glucose is (a) C-1 carbon (b) C-2 carbon (c) C-5 carbon (d) C-6 carbon. |
11 |
| 73 | dulu p’D’yUCUJU, D10 Question 2. How do you explain the presence of all the six carbon atom. in glucose in a straight chain? form n hoyane Forematie |
12 |
| 74 | Which of the following vitamins is water soluble? ( A cdot K ) B. E ( c cdot D ) D. ( B_{1} ) |
12 |
| 75 | List three main differences between DNA and RNA? |
11 |
| 76 | Which molecule binds to uracil in RNA? A. Thymine B. Guanine c. cytosine D. Adenine E. Uraci |
11 |
| 77 | Match column I with column II and mark the appropriate choice. Column I (A) Pentise sugar in DNA (i) Ascorbic acid (B) Nucleic acid (ii) Uracil (C) RNA (iii) Genetic material (D) Vitamin (iv) Furanose structure ( mathbf{A} cdot(A) rightarrow(i v) ;(B) rightarrow(i i i) ;(C) rightarrow(i i) ;(D) rightarrow(i) ) B. (A) ( rightarrow ) (iii); (B) ( rightarrow ) (ii); ( (C) rightarrow(text { iv ); }(D) rightarrow ) (i) C. ( (A) rightarrow(text { ii) } ;(B) rightarrow(text { iii) } ;(C) rightarrow(i v) ;(D) rightarrow(i) ) ( D cdot(A) rightarrow(i) ;(B) rightarrow(i i) ;(C) rightarrow(i i i) ;(D) rightarrow(i v) ) |
12 |
| 78 | Answer the following question: 1. Write Haworth projection formula of ( boldsymbol{alpha}-boldsymbol{D}-(+)- ) glycopyranose 2. Define hormones. |
12 |
| 79 | Which of the following is substituted purines? A. Adenine B. Cytosine c. Thymine D. Uracil |
12 |
| 80 | Proteins are made up of organic molecules with a divalent functional group. A. True B. False |
12 |
| 81 | When ATP is hydrolyzed, which of the bond is cleaved? A. P-O-P bond B. Sugar phosphate c. Phosphate nucleotide bond D. Nucleotide sugar bond |
11 |
| 82 | 75. A peptide made up of n number of amino acids contains how many peptide linkages? (a) n (b) n +1 (c) 2n-1 (d) n-1 (JIPMER) |
11 |
| 83 | Which of the following carbohydrates is the sweetest sugar? A. Glucose B. Fructose c. Cellulose D. Maltose |
12 |
| 84 | Which polysaccharide is a main constituent of cell wall in plants? | 12 |
| 85 | The permeases are A. Structural membrane proteins B. Enzymatic membrane proteins C. Carrier membrane proteins D. None of the above |
11 |
| 86 | Write two structure differences between DNA and RNA. |
12 |
| 87 | Starch molecules are polymer with repeating glucose units. Select the correct statement A. Glucose units are joined through ( beta ) -glycosidic linkage B. The branches of amylopectin are linked to the chain with ( alpha ) -1,4′-glycosidic linkages c. The linear linkages of amylopectin are formed by ( alpha ) -1,4′-glycosidic bond D. Amylose has an unbranched skeleton of glucose molecules with ( alpha ) -1,6-glycosidic linkages |
12 |
| 88 | ( D- ) glucose ( stackrel{H O^{-}}{rightleftharpoons} A+B ) ( A ) and ( B ) are: ( A cdot D- ) mannose and ( D ) – mannitol B. D – mannose and D – Fructose C. D – allose and D- Altrose D. D – Glucose and D- – Idose |
12 |
| 89 | The acidic amino acid is: A. Aspartic acid B. Alycine c. serine D. Tyrosine |
12 |
| 90 | For which vitamin liver is not the source ( ? ) A. Vitamin – ( B_{2} ) B. Vitamin – ( B_{1} ) c. vitamin – ( B_{12} ) D. Vitamin – ( H ) |
12 |
| 91 | Substance common in DNA and RNA is A. Hexose sugar B. Histamine c. Thymine D. Phosphate groups |
11 |
| 92 | Which of the following test cannot be used for identifying amino acids? A. Biuret test B. xanthoproteic test c. Barfoed test D. Ninhydrin test |
12 |
| 93 | From the following substances, which carbohydrates has the maximum sweetness? A. sucrolose B. Saccharin c. Aspartme D. Alitame |
12 |
| 94 | Hydrolysis of starch involves the use of the enzyme: A. maltase B. zymase c. invertase D. diastase |
12 |
| 95 | 10. Which of the following are monosaccharides? (a) Glucose and maltose (b) Glucose and sucrose (c) Glucose and ribose (d) None (COMEDK) |
11 |
| 96 | 8. The presence of primary alcoholic group in glucose can be confirmed by (a) oxidation of glucose with nitric acid (b) acetylation of glucose with acetic anhydride (c) oxidation of glucose with mild oxidising agent (d) prolonged heating of glucose with HI. CAMIL Mod)). |
11 |
| 97 | Steroid hormones lead to the : A. destruction of normal DNA B. replication of hormones by the cell DNA C. synthesis of new enzymes D. alteration of the Krebs cycle |
12 |
| 98 | 60. Glucose and cane sugar can be distinguished by (a) Fehling’s solution (b) Baeyer’s reagent (c) Molisch test (d) iodine solution. |
11 |
| 99 | The two anomers of fructofuranose are A . acetal B. hemiacetal c. both A and B D. none of these |
12 |
| 100 | 141. Nucleic acids are polymers of (a) nucleotides (b) nucleosides (c) nuclei of heavy metals (d) proteins. (J& |
11 |
| 101 | The number of hydrogen bonds between Guanine and Cytosine; and between Adenine and Thymine in DNA are: A ( cdot 1,2 ) B. 3, 2 ( c cdot 3, ) D. 2, |
12 |
| 102 | Which base is present in RNA but not in DNA? A . Uracil B. Thymine c. Guanine D. Cytosine |
11 |
| 103 | In aqueous solutions, amino acids mostly exist as: A. ( N H_{2}-C H(R)- ) COOH B . ( N H_{2}-C H(R)-C O O^{-} ) c. ( N H_{3}^{+}-C H(R)- ) COOH D. ( H_{3} N^{+}-C H(R)-C O O^{-} ) |
12 |
| 104 | State whether the following statements are true or false : (i) The general formula of alkanes is ( C_{n} H_{2 n+2} ) (ii) Carbohydrates are body building nutrients. |
12 |
| 105 | Conversion of acetyl Co-A to fatty acid is a/an A. Anabolic reaction B. Catabolic reaction c. Anabolic and catabolic reaction D. None of the above |
11 |
| 106 | Q. 32 Name the linkage connecting mono the linkage connecting monosaccharide units in polysaccharides. Ans. Givcosidin |
12 |
| 107 | Glycogen stored in liver and muscles of a man is a: A. monosaccharide B. polysaccharide c. protein D. fat |
12 |
| 108 | Ribonucleic acid occurs in A. Nucleus B. Cytoplasm C. Both A and B D. Mitochondria and chloroplast |
11 |
| 109 | Raffinose on hydrolysis forms A. Glucose B. Fructose c. Galactose D. All of these |
12 |
| 110 | Coenzymes NAD and NADP contain the vitamin A. Niacin B. Biotin c. Thiamine D. Vitamin ( B_{12} ) E. Vitamin ( A ) |
11 |
| 111 | Mark the wrong statement about denaturation of proteins. A. The primary structure of the protein does not change B. Globular proteins are converted into fibrous proteins C. Fibrous proteins are converted into globular proteins D. The biological activity of the protein is destroyed |
12 |
| 112 | Molecular scissors which cut DNA at specific site is known as A. Pectinase B. Polymerase c. Restriction endonuclease D. Ligase |
11 |
| 113 | 6. Which of the following is/are non-reducing sugar molecule/s? (i) Fructose (ii) Maltose (iii) Sucrose (iv) Lactose (a) (i) and (iii) (b) (i) and (iv) (c) (iii) only (d) (i) and (ii) (J & K CET) |
11 |
| 114 | O. 29 Name the sugar present in milk. How many monosaccharide units are present in it? What are such oligosaccharides called? |
11 |
| 115 | Q. 46 Amino acids behave like salts rather than simple amines or carboxylic acids. Explain. |
12 |
| 116 | Pick up the correct statement from the following: A. Glucose exists in two different crystalline forms, ( alpha- ) ( D- ) glucose and ( beta-D- ) glucose. B. Cyclic structure of ( alpha-D- ) glucose and ( beta-D- ) glucose is called pyranose structure. C ( . alpha-D- ) -glucose and ( beta-D- ) glucose are enantiomers. D. Cellulose is a straight chain polysaccharide made up of only ( beta ) – glucose units. |
12 |
| 117 | Match the scientists and their contribution given in the columns. Scientists ( quad ) Contribution A. Pasteur p. Beer and butter milk are products of fermentation by yeast B. Hansen ( quad ) q. Diastase C. Payen and ( quad ) r. Purified rennet Perso D. ( quad ) s. Streptomycin Waksman ( A cdot A-p, B-q, C-r, D-s ) B. A – p, B – r, C – q, D – s C. ( A-p, B-s, C-r, D-q ) D. ( A-s, B-r, C-q, D-p ) |
11 |
| 118 | Which enzymes has more affinity towards substrate? | 11 |
| 119 | Which of the following is not true about drug receptors? A. Receptor proteins are embedded in the cell membrane. B. The chemical known as chemical messengers are received at the binding sites of receptors. C. The receptors show selectively for one chemical messenger over the other. D. Receptor protein is decomposed and destroyed after removal of chemical messenger. |
12 |
| 120 | Consider the given compound and arrange ( X, Y, Z ) in order of increasing acid strengths? ( A cdot X>Z>Y ) B. ( Z>X>Y ) ( c cdot x>Y>z ) ( D cdot Y>X>Z ) |
12 |
| 121 | Which of the following statement is not true A. Co-enzymes are organic compound B. Association between apoenzyme and co-enzyme is permanent C. NADP contain the vitamin niacin D. Prosthetic group binds tightly to the apoenyme |
11 |
| 122 | LUULIOLI Q. 60 Assertion (A) D (+) – Glucose is dextrorotatory in nature. Reason (R) ‘D’ represents its dextrorotatory nature. dextrorotate |
12 |
| 123 | Which of the following carbohydrates is an essential constituent of all cell walls? A. Starch B. Maltose c. cellulose D. sucrose |
12 |
| 124 | Which of the following is not corretly matched for the organism and its cell wall degrading enzyme? A. Bacteria – Lysozyme B. Plant cells – Cellulase c. Algae – Methylase D. Fungi – Chitinase |
11 |
| 125 | Carbohydrates are used by body mainly: A. for obtaining vitamins B. as a source of energy c. for building muscles D. for all its development needs |
12 |
| 126 | What is the action of Biuret reagent on proteins? |
12 |
| 127 | Question 11. What are the essential and non-essential amino acids? Give two examples of each type. |
11 |
| 128 | Which sugar does not increases the calorific value? A. sucrose B. Glucose c. Aspartame D. Fructose |
12 |
| 129 | The number of disulphide linkages present in insulin are A . B. ( c cdot 3 ) ( D ) |
12 |
| 130 | Discribe about structure of proteins. | 12 |
| 131 | Glucose and cane sugar can be distinguished by tollen’s reagent or fehling’s solution. If true enter 1 else 0 ( A ) |
12 |
| 132 | What are the different ways in which glucose is oxidised to provide energy in various organism? |
12 |
| 133 | What is the basic structural difference between starch and cellulose? |
12 |
| 134 | Which one of the following structural formula of two organic compounds is correctly identified along with its related function? A. B- uracil a component of DNA B. A- triglyceride major source of energy c. A- lecithin a component of cell membrane D. B- adenine a nucleotide that makes up nucleic acid |
11 |
| 135 | On plotting a graph between substrate concentration and time, a scientist found a sigmoid curve. The enzyme is A. Allosteric B. Apoenzyme c. Mono enzyme D. Isozyme |
11 |
| 136 | The binding of the substrate induces the enzyme to alter its shape fitting more tightly around the substrate. |
11 |
| 137 | Toluidine blue specifically stains A. DNA B. RNAA c. chitin D. Lignin |
11 |
| 138 | Q. 56 How will you distinguish 1° and 2° hydroxyl groups present in glucose? Explain with reactions. Ane 1 and 2 hidrocrom |
12 |
| 139 | Raffinose is a: A. trisaccharide B. monosaccharide c. disaccharide D. none of the above |
12 |
| 140 | Which of the following is an acidic amino acid ? A. Glycine B. Valine c. Leucine D. Glumatic acid |
12 |
| 141 | 47. In aqueous solution glucose remains (a) only in open chain form (b) only in pyranose form (c) only in furanose form (d) in all three forms in equilibrium. |
11 |
| 142 | What are essential and non essential amino acids? |
12 |
| 143 | The complimentary base pairing in RNA molecules is seen between uracil and A. Thymine B. Guanine c. cytosine D. Adenine E. Uracil |
11 |
| 144 | The basic building unit of protein is: A. polypeptide B. amino acids ( c . ) amines D. carboxylic acids |
12 |
| 145 | Compound ( A ) has how many functional groups? [ begin{array}{l} text { a-Amino acid (A) } frac{mathrm{MeOH} / mathrm{HCl}}{left(mathrm{C}_{3} mathrm{H}_{7} mathrm{NO}_{3}right)} \ begin{array}{c} left.(mathrm{D})left(mathrm{C}_{3} mathrm{H}_{6} mathrm{NO}_{2} mathrm{Cl}right) quad stackrel{mathrm{H}_{3} mathrm{O}^{oplus}}{(mathrm{Na}-mathrm{Hg} / mathrm{HCl}}right) \ & (mathrm{D})left(mathrm{C}_{4} mathrm{H}_{9} mathrm{NO}_{2} mathrm{Cl}_{2}right) end{array} end{array} ] ( mathbf{A} cdot mathbf{1} ) B . 2 ( c cdot 3 ) ( D ) |
12 |
| 146 | Match the terms to these definitions Cofactor, coenzyme, holoenzyme, apoenzyme, ligases, lyases, transferases, isozymes, zymogens, competitive inhibitor, non-competitive inhibitor, activation energy …enzymes which catalyse the linking together of compounds utilising the energy from ATP |
11 |
| 147 | Q. 29 Name the sugar present in milk. How many monosaccharide units are present in it? What are such oligosaccharides called? Ane Sugar nrang To units of monosaccharides |
12 |
| 148 | In DNA hydrogen bond occurs between A. Phosphate and nitrogenous base B. Sugar and phosphate group c. Nitrogenous bases D. sugar and nitrogenous base |
11 |
| 149 | Which is correct statement? A. Starch is polymer of ( alpha ) -glucose. B. Amylose is a component of cellulose. C. Proteins are composed of only one type of amino acid. D. In cyclic structure of fructose, there are four carbons and one oxygen atom. |
12 |
| 150 | Prior to the work of Avery, MacLeod and McCarty (1933-44), the genetic material through to be ( A ). a Protein B. RNAA c. DNA D. a Carbohydrate |
11 |
| 151 | In a reaction, reactants form a transition state, before the formation of products. Which of the following is affected by the action of enzyme? A. Products only B. Reactants only c. Transition state only D. Products and reactants E. Transition state and products |
11 |
| 152 | Which of the following is not a genetic material? A. ds DNA B. ss DNA c. ( d s ) RNA D. None of the above |
11 |
| 153 | The letter ‘D’ in D – carbohydrates represents: A. Dextrorotation B. Direct synthesis c. configuration D. Mutarotation E. Optical activity |
12 |
| 154 | In fibrous proteins, polypeptide chains are held together by? A. van der waals forces B. electrostatic forces of attraction c. hydrogen bonds D. covalent bonds |
12 |
| 155 | 73. a-helix and B-pleated structures of proteins are classified as (a) primary structure b) secondary structure (c) tertiary structure d) quaternary structure. |
11 |
| 156 | Which of the following compounds can be detected by Molisch’s test?? A. Nitro compounds B. Sugars c. Amines D. Primary alcohols |
12 |
| 157 | What is denaturation of protein and name the two diseases caused due to deficiency of protein? |
12 |
| 158 | The process by which protein synthesis takes pace based on genetic information is called: A. Replication B. Messenger hypothesis c. Translation D. Transcription |
12 |
| 159 | The change in the sequence of amino acids of a protein results in: A. same protein B. different protein c. same protein with weaker peptide linkage D. none of these |
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| 160 | ( 2 % ) of adult globin in humans is made of ( B cdot zeta_{2}, gamma_{2} ) c. ( alpha_{2}, delta_{2} ) D. ( alpha_{2}, gamma_{2} ) |
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| 161 | DNA and RNA are the information molecules of the cell. Explain clearly the differences in the basic structure of these two molecules. |
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| 162 | The protein part of enzyme is known as A. Holoenzyme B. Apoenzyme c. Isoenzyme D. All of the above |
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| 163 | Match the following ( begin{array}{ll}text { Set A } & text { Set B } \ text { 1. Adenine } & text { a. } C_{5} N_{5} H_{5} O \ text { 2. Guanine } & text { b. } C_{4} N_{2} H_{4} O_{2} \ text { 3. Uracil } & text { c. } C_{5} N_{5} H_{5} \ text { 4. Thymine } & text { d. } C_{5} N_{2} H_{6} O_{2}end{array} ) ( mathbf{A} ) ( 1-c ; 2-a ; 3-d ; 4-b ) B. ( 1-c ; 2-b ; 3-d ; 4-e ) c. ( 1-b ; 2-c ; 3-d ; 4-a ) D. ( 1-c ; 2-a ; 3-b ; 4-d ) |
12 |
| 164 | 78. Assertion : Insulin is water soluble. Reason : Insulin is a globular protein. (a) If both assertion and reason are true and reason is the correct explanation of assertion. (b) If both assertion and reason are true but reason is not the correct explanation of assertion. (c) If assertion is true but reason is false. (d) If both assertion and reason are false. (AIMS) |
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| 165 | The anomers of fructofuranose are called: A. ( alpha ) anomers B. ( beta ) anomers c. both ( A ) and ( B ) D. none of these |
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| 166 | Name the two nucleic acids present in the cell. A. (i) RNA (ii) DNA B. (i) RNA (ii) Mitochondria c. (i) DNA (ii) Mitochondria D. (i) DNA (ii) Ribosome |
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| 167 | Which is not true of enzymes? A. They are specific B. They are made of globular proteins C. Enzymes are most active at maximum temperature D. They are most active at optimum temperature |
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| 168 | The chemical change in DNA molecule that could lead to synthesis of protein with an altered amino acid sequence is called A. replication B. lipid formation c. cellular membrane D. mutation |
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| 169 | Which one of the following vitamins is water soluble? A. Vitamin ( B ) B. Vitamin ( E ) c. Vitamin ( K ) D. Vitamin ( A ) |
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| 170 | 162. Which of the following is an amine hormone? (a) Insulin (b) Progesterone (c) Thyroxine (d) Oxypurin (A |
12 |
| 171 | What is the name of disaccharides sugar present in milk? |
12 |
| 172 | Starch is converted into maltose by an enzyme: A. maltase B. zymase c. diastase D. invertage |
12 |
| 173 | The dotted line with label A on the graph represents which of the following? A. The amount of energy a reaction would need without an enzyme B. The amount of energy a reaction would need with an enzyme C. The speed of the reaction. D. The amount of energy needed to start the reaction witt an enzyme |
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| 174 | Which of the following is NOT a protein? ( A ). Wool B. Cellulose c. Hair D. Nail |
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| 175 | Which of the following hexoses will form the same osazone when treated with excess phenyl hydrazine? A. D-glucose, D-fructose and D-galactose B. D-glucose, D-fructose and D-mannose c. D-glucose, D-mannose and D-galactose D. D-fructose, D-mannose and D-galactose |
12 |
| 176 | 1. A molecule of Stachyose contains how many carbon atoms? (a) 6 (b) 12 (C) 18 (d) 24 MMHT CET) |
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| 177 | 24. Which one of the following sets of monosaccharides forms sucrose? (a) A-D-galactopyranose and a-D glucopyranose (b) A-D-glucopyranose and B-D-fructofuranose (c) B-D-glucopyranose and a-D-fructofuranose (d) A-D-glucopyranose and B-D-fructopyranose |
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| 178 | Who proposed cAMP mediated ‘Cascade model’ of enzyme regulation? A. Fischer B. Sutherland c. Sumner D. Koshland |
11 |
| 179 | What are hormones? Give an example for each of the following: (a) Steroid hormones (b) Polypeptide hormones (c) Amino acid derivatives |
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| 180 | Which of the following is not related to Watson and Crick model of DNA? A. X-ray crystallography B. The Meselson-Stahl experiment C. Chargaff’s rules D. The different sizes of purines and pyrimidines E. The transforming principle of Avery et al |
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| 181 | The functional groups present in cytosine are: A. Keto and amino B. Keto only c. Amino only D. methy |
12 |
| 182 | Define peptide linkage. | 12 |
| 183 | Q. 33 Under what condtions glucose is converted to gluconic acid and saccharide acid? |
12 |
| 184 | Select the wrong statement. A. Proteins are heteropolymers made of amino acids. B. Ribozymes are nucleic acids with catalytic power. C. Nucleic acids serve as genetic material. D. Proteins, nucleic acids are macromolecules found in the living system. E. Collagen is the most abundant protein in the whole of the biosphere and RuBisCo is the most abundant proteins in animal world. |
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| 185 | Which of the following statement about enzyme inhibitors is incorrect? A. A competitive inhibitor binds the active site of the enzyme B. An allosteric inhibitor binds a site on the active site of the enzyme. C. A noncompetitive inhibitor binds a site other than the active site D. Noncompetitive inhibition cannot be completely overcomes by the addition of more substrate. |
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| 186 | What are the values (at least two) displayed by Rupali? |
12 |
| 187 | 0.35 The letters ‘D’ or ‘l before the name of a stereoisomer of a compound indicate the correlation of configuration of that particular stereoisomer. This refers to their relation with one of the isomers of glyceraldehyde. Predict whether the following compound has ‘D’ or ‘L configuration. CHO НО -н HH OH но — Н НО – Н CH2OH |
11 |
| 188 | —— CELUIN L L LLLLLL Question 4. Which site of an enzyme is called allosteric site? Solution. Sites different from active site of enzyme where a molecu |
12 |
| 189 | Question 18. What is the effect of denaturation on the structure of proteins? |
11 |
| 190 | The scientist awarded Nobel prize in 1959 for in vitro synthesis of polyribonucleotide was A. Mendel B. Calvin c. Khorana D. Ochoa |
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| 191 | Tulliuluiu ULT) 45. Glucose reacts with Tollens’ reagent to give derivative of (a) monocarboxylic acid (b) dicarboxylic acid (c) ketone (d) keto acid. (OJEE) |
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| 192 | Which of the following statements is/are correct? I. The formula of cellulose is ( left(C_{6} H_{10} O_{5}right) ) II. The formula of sucrose, maltose and lactose is ( C_{12} H_{22} O_{11} ) III.The formula of Glucose, Fructose and Ribose is ( C_{6} H_{12} O_{6} ) IV. The formula of Fructose of ( C_{6} H_{12} O_{6} ) A . all B. ।, ॥ land IV c. ॥, ॥ा and । D. I, III and IV |
12 |
| 193 | 9. Which one of the following carbohydrates gives equimolar mixture of D-(+) glucose and D-(-) fructose on hydrolysis? (a) Maltose (b) Lactose (c) Amylose (d) Sucrose |
11 |
| 194 | Which fat soluble vitamin is present in liver cell? A. ( A ) в. ( D ) ( c . E ) D. Both Vitamin A and D |
12 |
| 195 | A polysaccharide that is used to determine the glomerular filtration rate is inulin, is extracted from roots of A. Dahlia B. Gladiolus c. chrysanthemum D. Sunflower |
11 |
| 196 | Which is/are a female Sex Hormone(s)? A. Estrogen B. Estradiol c. Progesterone D. All of the above |
12 |
| 197 | Assertion Enzyme differ from man-made catalysts as the enzymes affect fewer substrates Reason Enterokinase is activator for pepsin. A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion c. Assertion is correct but Reason is incorrect D. Both Assertion and Reason are incorrect |
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| 198 | In fructofuranose, OH group of which carbon adds to ( >boldsymbol{C}=boldsymbol{O} ) group? A. ( C_{3} ) в. ( C_{4} ) c. ( C_{5} ) D. ( C_{2} ) |
12 |
| 199 | ATP-ADP system was discovered in A . 1940 B. 1944 ( c cdot 1943 ) D. 1840 |
11 |
| 200 | Complete hydrolysis of cellulose gives: A . D-fructose B. D-ribose c. D-glucose D. L-glucose |
12 |
| 201 | toppr Q Type your question structure is: ( A ) ( B ) ( c ) ( D ) |
12 |
| 202 | Which enzyme converts glucose to ethanol? A . Diesterase B. Invertase c. zymase D. Both (2) and (3) |
12 |
| 203 | ( mathrm{K}_{m} ) is related to A. Morphology B. ABO blood group c. ES complex D. chromatography |
11 |
| 204 | Major role of minor elements inside living organisms is to act as A. cofactors of enzymes B. Binder of cell structure c. constitutent of hormones D. Building blocks of amino acids |
11 |
| 205 | In RNA thymine is replaced by which nucleotide? A. Adenine B. Uraci c. cytosine D. Guanine |
12 |
| 206 | Enzymes are: A. proteins B. lipids C . carbohydrates D. nucleic acids |
11 |
| 207 | Which disaccharide is present in milk? A. Maltose B. Galactose c. sucrose D. Lactose |
12 |
| 208 | Which of the following maintains constant sugar level in blood? A. Gibberlins B. Insulin c. Glucogen D. Estrone |
12 |
| 209 | Which of the following pair is an odd pair? A. Chitin – Carbohydrates B. Pectin – Protein c. steroid – Lipid D. wax – Lipid |
11 |
| 210 | (t)-Sucrose has a specific rotation of ( +66.5, ) while ( D-(+) ) -glucose and D-(-)fructose have specific rotations of +52.5 and -92.4 respectively. After complete hydrolysis of (+)-sucrose by dilute acid, what will be the specific rotation of the hydrolysis product, called invert sugar [a 1: 1 mixture of ( D ) – ( (+) ) -glucose and ( D ) (-)-fructose] ? ( A cdot-39.9 ) в. -72.4 ( c .-19.9 ) D. -34.9 |
12 |
| 211 | Rat in any food chain would occupy the position of A. Tertiary consumer B. Secondary consumer c. Primary consumer D. Producer |
12 |
| 212 | Q.53 Which monosaccharide units are present in starch, cellulose and glucose and which linkages link these units? |
11 |
| 213 | What is the similarity between DNA and RNA? A. Both are polymer of nucleotides B. Both have similar pyrimidine c. Both have similar sugar D. Both are genetic material |
11 |
| 214 | Distinguish between RNA and DNA : | 12 |
| 215 | Class of enzymes contained in Iysosome A. Lyases B. Ligases c. Hydrolases D. Transferases |
11 |
| 216 | An anticodon region is present in nucleic acid A. DNA B. mRNA c. rRNA D. snRNA E. tRNA |
11 |
| 217 | Naturally occurring amino acids have configuration: ( A cdot D ) B. c. either D or ( L ) D. neither D nor L |
12 |
| 218 | Nucleic acids are called acids mainly because of the presence of A. ( -C O O H ) group B. – OH group of sugar unitt c. ( -O H ) group of the heterocyclic base D. – OH group of phosphate unitt |
12 |
| 219 | Give the Free amino acids obtained on the hydrolysis of ‘Aspartame’. |
12 |
| 220 | 57. Which one of the following has maximum laevorotatory nature? (a) D-glucose (b) D-Fructose (c) Sucrose (d) Invert Sugar &K CET) |
11 |
| 221 | The compound, which give a positive ninhydrin test and a negative Benedict’s solution test, is: A. a monosaccharide B. a disaccharide c. a lipid D. a protein |
12 |
| 222 | Assertion Enzymes becomes inactive below minimum temperature. Reason The inactivity of the enzyme is due to denaturation. A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion C. Assertion is correct but Reason is incorrect D. Both Assertion and Reason are incorrect |
11 |
| 223 | Fumarase belong to the major class of: A. oxidoreductases B. transferases c. hydrolases D. ligases |
11 |
| 224 | Cellulose is a: A. protein B. carbohydrate C. simple sugar D. all the above |
12 |
| 225 | Photosynthesis is an example of A. Anabolism B. Endergonic reactions c. Both A and B D. Exergonic reactions |
11 |
| 226 | toppr Q Type your question inkage. ( mathbf{A} ) ( B ) ( mathbf{C} ) ( D ) ( E ) |
12 |
| 227 | A molecule of Stachyose contains how many carbon atoms? A. 6 B. 12 ( c cdot 18 ) D. 24 |
12 |
| 228 | Which of the following statements about RNA is not correct? A. It has a single strand B. It does not undergo with the replication of bases c. It does not contain any pyrimidine base D. It controls the synthesis of proteins |
12 |
| 229 | Sulfur containing amino acid is : A. Alanine B. Proline c. Tyrosine D. Cysteine |
12 |
| 230 | toppr ( t ) Q Type your question ( B ) ( c ) ( D ) |
12 |
| 231 | What is the volume of water consumed during acid hydrolysis of ( 1.368 K g ) of sucrose? (Given – molar masses of sucrose ( =mathbf{3 4 2} ) water ( =18, ) density of water ( =1 g / c m^{3} ) В. ( 0.720 d m^{3} ) c. ( 0.18 d m^{3} ) D. ( 0.018 d m^{3} ) |
12 |
| 232 | Ribose sugar is present in A. RNA polymerase, RNA and ATP B. RNA only c. RNA polymerase and ATP D. RNA and ATP |
11 |
| 233 | Formation of nucleotide is a A. Anabolic reaction B. Catabolic reaction c. Both A and B D. None of the above |
11 |
| 234 | Polysaccharide monomers are linked by A. Peptide bonds B. Glycosidic bonds c. Hydrogen bonds D. Phosphodiester bonds |
11 |
| 235 | is the stored carbohydrates in animals. A. Cellulose B. Glycogen c. starch D. Glucose E . Fructose |
11 |
| 236 | . 20 Carbohydrates are classified on the basis of their behaviour on hydrolysis and also as reducing or non-reducing sugar. Sucrose is a ………. (a) monosaccharide (b) disaccharide (c) reducing sugar (d) non-reducing sugar Ane hd |
12 |
| 237 | Q. 67 Write the reactions of D-glucose which can’t be explained by its open chain structure. How can cyclic structure of glucose explain these reactions? |
12 |
| 238 | What are ‘nucleic acids’? Define complex lipids. Mention any ‘two functions of lipids. |
12 |
| 239 | 0.38 Amino acids can be classified as a-, B-, Y-, 8- and so on depending upon the relative position of amino group with respect to carboxyl group. Which type of amino acids form polypeptide chain in proteins? |
11 |
| 240 | Which of the following is a reducing sugar? A. Galactose B. Gluconic acid c. ( beta ) -methyl galactoside D. sucrose |
12 |
| 241 | The Glycosidic linkage present in sucrose is between: A. ( C-1 ) of ( alpha ) – glucose and ( C-2 ) of ( beta ) -fructose B. C-1 of ( beta ) -galactose and C-4 of ( alpha ) -glucose C. ( C-1 ) of ( alpha ) -glucose and ( C-4 ) of ( beta ) – fructose D. ( mathrm{C}-1 ) of ( alpha ) -glucose and ( mathrm{C}-4 ) of ( alpha ) -glucose |
12 |
| 242 | Choose the 0 DD one out of the following terms given and name the CATEGORY to which the others belong: Phosphate, RNA, Sugar, Nitrogenous base. |
11 |
| 243 | Which among the following are purine derivatives among the following bases? 1. Adenine 2.Uracil 3.Guanine 4.Thymine A ( cdot 1,4 ) only B. 2, 3 only c. 1,3 only D. 1,3,4 only |
12 |
| 244 | A disaccharide may contain different types of monosaccharide units. A. True B. False |
12 |
| 245 | Draw the structures of Harworth projection formula of fructose. |
12 |
| 246 | Which of the following coenzyme is a derivative of pantothenic acid (Vitamin B complex)? A. NAD B. NADP c. FAD D. coA |
11 |
| 247 | Q. 47 Structures of glycine and alanine are given below. Show the name linkage in glycylalanine. HN – CH, – COOH ; H2N – CH – CH3 (Glycince) (Alanine) A tilboob other produce abdolanine |
12 |
| 248 | What is the ( p H ) of a solution containing the following zwitter ion species? |
12 |
| 249 | 77. Within the list shown below, the correct pair of structures of alanine in pH ranges 2-4 and 9-11 is I. H2N*–CH(CH3)CO,H II. H2N-CH(CH3)COZ III. H2N-CH(CH3)CO, IV. H2N-CH(CH3)CO2H (a) I, II (b) I, III (c) II, III (d) III, IV (WB JEE) |
11 |
| 250 | How many high energy bonds are present in ADP? A. one B. Two c. Three D. Four |
11 |
| 251 | Column-I (A) Tyrosine (P)Essential amino acids (B) Serin (Q) Ceric Ammonium Nitrate ( (mathrm{C}) ) Tryptophane (R) Neutral ( F e C l_{3} ) (S) Carbaylamine Test – (D) Proline ( quad ) Negative. Select the correct set of answer. ( A cdot A-R, B-Q, C-P, D-S ) B. A-Q, B-R, C-S, D-P C. ( A-R, B-P, C-Q, D-S ) D. A-S, B-Q, C-P, D-R |
12 |
| 252 | Proteinaceous nature of enzyme was suggested by A. T. cech B. Kuhne c. E. Buchner D. Northrop |
11 |
| 253 | Question 3. In nucleoside a base is attached at l’-position of Sud moiety. Nucleotide is formed by linking of phosphoric acid unit to 11 sugar unit of nucleoside. At which position of sugar unit is the phosphon acid linked in a nucleoside to give a nucleotide? .. 11 |
12 |
| 254 | Which of these is not a macromolecule? A . Cellulose B. DNA c. Glycogen D. None of the above |
11 |
| 255 | Fibrous proteins and globular proteins can be differentiated on the basis of: A. primary and secondary structures B. secondary structures only c. tertiary structures D. primary structures only |
12 |
| 256 | The term vitamin was introduced by A. Dr. Funk B. Dr Edwards c. Dr.Strepto D. Dr Indira Hinduja |
12 |
| 257 | The “lock and key” model of enzyme action illustrates that a particular enzyme molecule A. May be destroyed and resynthesized several times B. Interacts with a specific type of substrate molecul c. Reacts at identical rates under all conditions D. Forms a permanent enzyme-substrate complex |
11 |
| 258 | When sugar is treated with sulphuric acid, we get a very pure form of: A. carbon B. oxygen c. water D. hydrogen |
12 |
| 259 | Pick up a set with non-essential amino acids: A. Lysine, Valine, Leucine B. Serine, Tyrosine, Cysteine C. Tryptophan, Phenylalanine, Isoleucine D. Threonine, Methionine, Lysine |
12 |
| 260 | 0.27 Which of the following are purine bases? (a) Guanine (b) Adenine (c) Thymine (d) Uracil |
11 |
| 261 | An example of water soluble vitamin is: A. vitamin D B. vitamin E c. vitamin A D. vitamin C |
12 |
| 262 | | 71. Lysine is least soluble in water in the pH range (a) 3 to 4 (b) 5 to 6 (c) 6 to 7 (d) 9 to 10 |
11 |
| 263 | The first enzyme isolated in crystalline form was A . Catalase B. Urease c. Peroxidase D. Amylase |
11 |
| 264 | Q Type your question ルIVA A. Uraci B. Cytosine C. Guanine D. Thymine |
12 |
| 265 | Nucleic acids were discovered by A. Watson and Crick B. Khorana c. wilkins D. Miescher |
11 |
| 266 | An organic substance bound to an enzyme and essential for its activity is called as A. Apoenzyme B. Isoenzyme c. coenzyme D. Holoenzyme |
11 |
| 267 | Deficiency of which vitamin causes the disease “Rickets”. | 12 |
| 268 | A nucleic acid can be synthesized only in the direction of A. ( 5-3 ) B. 3-5 ( c cdot 5-5 ) ( D cdot 3-3 ) |
12 |
| 269 | Each codon consists of how many nitrogen bases? A. four B. twenty c. three D. sixty four |
12 |
| 270 | The RNA and DNA differ in having different A. Type of pentose sugar B. Type of Phosphates c. Type of Nitrogen base D. Both A and C |
11 |
| 271 | Mention any one hydrolytic product of lecithin. | 12 |
| 272 | Glycoside linkage is an A. Amide linkage B. Ether linkage c. Ester linkage D. None of these |
12 |
| 273 | All chemical characteristics are common to living beings, except A. Type of protein present in the body. B. Similar triple code for amino acids. C. Energy is stored by high phosphate bonds. D. Ribosomes are the sites of protein synthesis. |
11 |
| 274 | Which of the following is present in sillk fibre? A. carbohydrate B. Lipids c. Proteins D. Fats |
12 |
| 275 | Q. 2 Which of the following polymer is stored in the liver of ani (a) Amylose (b) Cellulose (c) Amylopectin (d) Glycogen muscles of animals, CA |
12 |
| 276 | Which one value is required for better enzymatic action? A . High ( mathrm{K} ) B . Low k c. Low ( kappa_{m} ) D. High ( mathrm{K}_{m} ) |
11 |
| 277 | Which of the following is a basic amino acid? This question has multiple correct options A. Leucine B. Methionine c. Aspargine D. Arginine |
12 |
| 278 | Which one of the following statements about starch is correct? A. It occurs in the cell walls of plants B. It is a disaccharide C. It is present in roots and seeds of plants D. It gives a red orange precipitate on boiling with Fehlings solution |
12 |
| 279 | In the Molisch reagent the substance used is: A. ( beta ) naphthol in alchol B. ( alpha ) naphthol in alchol c. Reasrcinol in alchol D. Rosaniline in water |
12 |
| 280 | Carbohydrates containing more than 10 simple units of sugar are called: A. Monosaccharides B. Disaccharides c. Trisaccharides D. Polysaccharides |
12 |
| 281 | 139. In nucleic acids the nucleotides are linked by (a) ester linkage (b) amide linkage (c) peptide linkage (d) glycosidic linkage. |
11 |
| 282 | ( beta ) -pleated sheet structure of polypeptide contains: A. intermolecular hydrogen bonds B. intramolecular hydrogen bonds ( c . ) both ( A ) and ( B ) D. none of these |
12 |
| 283 | ( theta ) toppr Q Type your question was isolated from the intestinal lining of a calf. Assays were undertaken to evaluate the activity of the enzyme sample. The substrate of lactase is the disaccharide lactose. Lactase breaks a lactose molecule in two, producing a glucose molecule and a galactose molecule. Two assays were carried out. Assay Lactose ( begin{array}{llll}text { concentration } & 15 & 15 & 15end{array} ) (% w/v) concentration of enzyme ( operatorname{sample(s一u/v)} ) Reaction rate u moleglucose ( quad ) o ( quad ) 25 ( quad ) 50 ( s e c^{-1} m L^{-1} ) Assay 2 Lactose ( begin{array}{llll}text { concentration } & text { o } & text { 5 } & text { 15 }end{array} ) (% w/v) concentra of enzyme ( operatorname{sample}(% v / v v ) Reaction rate mu mole glucose ( quad ) o ( quad 15 quad ) 25 ( sec ^{-1} m L^{-1} ) What are the variables in each of the two assays? A. Assay1- Lactose concentration Assay 2 – concentration of enzyme sample B. Assay 1- concentration of enzyme sample Assay 2 – Lactose concentration c. Assay 1 – Lactose concentration Assay 2 – Lactose concentration D. Assay 1- concentration of enzyme sample Assay 2- -concentration of enzyme sample |
11 |
| 284 | Which one is not a commercial energy? A. coal B. Animal power C. Petroleum and natural gas D. Electricity |
11 |
| 285 | For its activity, carboxypeptidase requires A. Iron B. Niacin c. copper. D. zinc |
11 |
| 286 | Which of the following is correct? A. Catalyst undergoes permanent chemical change. B. Particle size of solute in true solution is ( 10^{-3} mathrm{m} ) C. Starch solution is a hydrosol. D. Hydrolysis of liquid ester in the presence of mineral acid is an example of heterogeneous catalysis reactions. |
12 |
| 287 | Question 5. What do you understand by the term glycosidic linkage sol 1 |
11 |
| 288 | 0.54 How do enzymes help a substrate to be attacked by the reagent effectively? |
12 |
| 289 | Write only equation for the reactions for preparation of glucose from sugar and starch. | 12 |
| 290 | If the base sequence in DNA is ( 5^{prime} ) AAAA ( 3^{prime} ) then the bases sequence in mRNA is A . 5′ UUUU 3 B. 3′ UUUU 5′ C . 5′ AAAA 3′ D. 3′ गागा 5′ |
11 |
| 291 | Which is a fat-soluble vitamin? A. Vitamin A B. Vitamin ( B_{6} ) c. vitamin c D. Vitamin ( B_{2} ) |
12 |
| 292 | 2.25 Which of the following monosaccharides are present as five membered cyclic structure (furanose structure)? (a) Ribose (b) Glucose (c) Fructose (d) Galactose ns. (a, c) |
12 |
| 293 | The vitamin which is water soluble and antioxidant is : A. vitamin B ( _{6} ) B. vitamin Biz. c. vitamin c. D. vitamin E. |
12 |
| 294 | Which of the following sets of bases are present both in both DNA and RNA? A. Adenine, Uracil, Thymine B. Adenine, Guanine, Cytosine c. Adenine, Guanine, Uraci D. Adenine, Guanine, Thymine |
12 |
| 295 | ( K_{m} ) value of enzyme is substrate concentration at ( A cdot 10 vee_{max } ) B. ( 0.5 / 1 mathrm{V}_{max } ) c. ( 1 / 2 mathrm{v}_{max } ) D. ( 4 / 5 mathrm{V}_{max } ) |
11 |
| 296 | Select the incorrect statement(s). This question has multiple correct options A. Monosaccharides are insoluble in organic solvents like diethyl ether. B. Anomers of cyclic monosaccharides differ in the position of the ( -O H ) group at the hemiacetal carbon. C. In D-Ribose, the ( -O H ) group used to form the fivemembered furanose ring is located on ( C_{4} ) carbon. D. Aldopentoses and ketohexoses form pyranose rings in solution |
12 |
| 297 | 42. Glucose is a type of (1) Pentose sugar (2) Hexose sugar (3) Tetrose sugar (4) Diose sugar |
12 |
| 298 | For RNA-interference, two scientists got Nobel prize in ( 2006 . ) In which organism these scientists discovered this process? A. Paragonimus westermani B. Hymenolepis nana c. Echinococcus granulosus D. caenorhabditis elegans |
11 |
| 299 | Select the correct options. This question has multiple correct options A. Isoelectric point is the ( mathrm{pH} ) at which an amino acid exists primarily in its neutral from B. Isoelectric point is the average of ( p K_{a} ) value of ( alpha ) ( C O O H ) amino ( alpha-N H_{3}^{+} ) groups[valid only for neutral amino acid] C . Glycine is characterised by two ( p K_{a} ) values D. For neutral amino acid, the concentration of zwitter ion is maximum at its isoelectric point |
12 |
| 300 | D-Ribose forms a five-membered ring. A. True B. False |
12 |
| 301 | Which one of the following carbohydrates is a monosaccharide? A. Ribose B. Arabinose c. Lyxose D. All of these |
12 |
| 302 | 4. Glucose HCN, Hydrolysis, HI, heat »A, A is (a) heptanoic acid (b) 2-iodohexane (c) heptane (d) heptanol. (ANIN |
11 |
| 303 | Which of the following is not a fat soluble vitamin? A. Vitamin – B complex B. Vitamin – D c. vitamin – E D. Vitamin – A |
12 |
| 304 | Which one of the following statements is not true regarding ( (+) ) lactose? A. On hydrolysis, (+) lactose give equal amount of ( D(+) ) glucose and ( D(+) ) galactose B. ( (+) ) Lactose is a ( beta- ) glucoside formed by union of a molecule of ( D(+) ) glucose and a molecule of ( D(+) ) galactose ( mathrm{C} cdot(+) ) Lactose is a reducing sugar and does not exhibit mutarotation D. (+) Lactose, ( C_{12} H_{22} O_{11} ) contains 8-OH goups |
12 |
| 305 | Which of the following is an antidiabetic drug: A . Insulin B. Penicillin c. chloroquine D. Aspirin |
12 |
| 306 | Nucleic acids control heredity at: A. atomic Level B. ionic level c. complex level D. molecular level |
12 |
| 307 | Which statement is false regarding nucleic acids? A. Base pairing occurs between purine and pyrimidine B. The two nucleotide chains in DNA have opposite polarity c. Guanine : cytosine bonding involves the formation of two hydrogen bonds D. A hydrogen-bonded base pairs in a DNA double helix forms an approximately planar structure |
11 |
| 308 | . 11 Each polypeptide in a protein has amino acids linked with each other in a specific sequence. This sequence of amino acids is said to be (a) primary structure of proteins (b) secondary structure of proteins (C) tertiary structure of proteins (d) quateranary structure of proteins |
11 |
| 309 | Which one of the following pairs is not correctly matched? A. Recombinant DNA – DNA formed by the joining of segments of DNA from different sources B. Purine – Nitrogenous bases cytosine, thymine and uracil C. ATP – The principal energy carrying compound in the cell D. r-RNA – RNA molecules found in ribosomes |
11 |
| 310 | The high-energy bonds of ATP are between A . C-C B. C-O c. ( c-N ) D. P- – |
11 |
| 311 | Augmentation of phosphorylation of glucose in a cell is affected by which hormone? A. Testosterone B. Estrone c. Insulin D. Tri iodo Thyroxine |
12 |
| 312 | Which of the following proteins is globular? A. Collagen B. Albumin c. Myosin D. Fibroin |
12 |
| 313 | Which name is associated with the chemical substances produced in endocrine ductless glands? A. Vitamins B. Antigens c. Bile acids D. Hormones |
12 |
| 314 | The structural component of ribosome is A . t-RNA B. m-RNA c. r-RNA D. DNA |
12 |
| 315 | Which of the following ( alpha ) -amino acids does not contain a chiral carbon? A . Glycine B. Alanine c. Phenylalanine D. valine |
12 |
| 316 | The general formula of disaccharides is A. ( C_{12} H_{22} O_{10} ) В. ( C_{12} H_{22} O_{12} ) c. ( C_{12} H_{22} O_{11} ) D. none of these |
12 |
| 317 | The sequence of DNA base is GCACCTAT. Then, the sequence of m-RNA is A . CGUGGAUA в. СGTGGATA c. сGUGGATA D. СGтGGтАТ |
12 |
| 318 | 5. Assertion : A solution of sucrose in water is dextrorotatory. But on hydrolysis in the presence of a little hydrochloric acid, it becomes laevorotatory. Reason: Sucrose on hydrolysis gives unequal amounts of glucose and fructose. As a result of this, change in sign of rotation is observed. (a) If both assertion and reason are true and reason is the correct explanation of assertion. (b) If both assertion and reason are true but reason is not the correct explanation of assertion. (c) If assertion is true but reason is false. (d) If both assertion and reason are false. (AIIMS) |
11 |
| 319 | Which of the following is the monomer of cellulose? A. ( beta-D ) -glucose B. Amylose c. Amylopectin D. Glycogen |
12 |
| 320 | The optical rotation of the ( alpha ) form of pyranose is ( +150.7^{0}, ) that of the ( beta ) form is ( +52.8^{0} . ) In solution an equilibrium mixture of these anomers has an optical rotation of ( +80.2^{0} . ) The percentage of the ( alpha ) – form in equilibrium mixture is: ( mathbf{A} cdot 28 % ) B. ( 32 % ) ( c .68 % ) D. ( 72 % ) |
12 |
| 321 | Which of the following enzymes has/have heme as a prosthetic group? (i) Catalase (ii) Carboxypeptidase (iii) Succinic dehydrogenase (iv) Peroxidase ( A cdot( ) i) only B. (i) and (ii) c. (ii) and (iii) D. (iii) and (iv) E. (i) and (iv) |
11 |
| 322 | Lactose is a disaccharide of : A. ( alpha-D ) -Glucose and ( alpha-D ) -Fructose B . ( beta-D ) -Glucose and ( beta-D ) -Galactose C ( . alpha-D ) -Glucose and ( beta-D ) -Ribose D. ( alpha-D ) -Glucose and ( alpha-D ) -Galactose |
12 |
| 323 | The DNA molecule has uniform diameter due to A. Double strandedness. B. Presence of phosphate. c. specific base pairing between purine and pyrimidine. D. None of the above |
11 |
| 324 | A carbohydrate which cannot be hydrolysed to simpler compounds is called: A. monosaccharide B. disaccharide c. polysaccharide D. oligosaccharide |
12 |
| 325 | Which of the following does not reduce Benedict’s solution? A. sucrose B. Aldehyde c. Glucose D. Fructose |
12 |
| 326 | The best source of vitamin A is: A. oranges B. beans c. carrots D. wheat |
12 |
| 327 | ( frac{2}{frac{2}{2}} ) | 12 |
| 328 | Cane sugar is made up of: A. 5 membered glucose ring and 5 membered fructose ring B. 6 membered glucose ring and 5 membered fructose ring C. 6 membered glucose ring and 6 membered fructose ring D. 6 membered glucose ring and 5 membered galactose ring |
12 |
| 329 | Which is always amphoteric in nature? A. Electrolytes B. Lipids c. Carbohydrates D. Proteins E. Nucleic acids |
12 |
| 330 | Amino acids are: A. Acidic B. basic c. neutral D. acidic, basic or neutral |
12 |
| 331 | Gene is composed of which of the following? A. Amino acids B. Polynucleotide c. Fatty acid D. Nitrogen bases |
11 |
| 332 | What is the procedure followed for testing the starch? | 11 |
| 333 | In the living tissues ‘energy broker’ or intermediary source of energy compound formed during glucose oxidation is A. NAD B. DNA c. RNA D. ATP |
11 |
| 334 | An organic substance essential for activity of an enzyme is A. Apoenzyme B. Holoenzyme c. Isoenzyme D. coenzyme |
11 |
| 335 | An example of disaccharide, made up of two units of the same monosaccharide, is: A. maltose B. sucrose c. lactose D. none |
12 |
| 336 | Two vitamins absorbed from intestines, along with fats, are: A. A and D B. A and B c. A and ( c ) D. D and B |
12 |
| 337 | An organic substance bound to an enzyme and essential for its activity is A. Isoenzyme B. Coenzyme c. Apoenzyme D. Holoenzyme |
11 |
| 338 | Molecular formula of Retinol is: A ( cdot C_{20} H_{29} O H ) в. ( C_{17} H_{35} O H ) ( mathbf{c} cdot C_{12} H_{25} O H ) D. ( C_{17} H_{33} O H ) |
12 |
| 339 | What is the range of molecular weight of cellulose? | 12 |
| 340 | The carbohydrates are classified on the basis of: This question has multiple correct options A. sugars and non-sugars B. reducing character c. optical activity D. hydrolysis |
12 |
| 341 | H-C-oh 18. D(+)-glucose reacts with hydroxyl amine and yields an oxime. The structure of the oxime would be (a) CH=NOH (6) CH=NOH H-C-OH HO-C-H HO-C-H HO-C-H но-с-н H-C-OH H-C-OH CH, OH СН, ОН CH=NOH CHE NOH HO-C-H H-C-OH H-C-OH HOẠC- H H-C-OH HO-C- H H-C-OH H-C-OH CH, OH CH, OH (c) (ΔΙΡΤ) |
11 |
| 342 | What is Secondary structure of protein? | 12 |
| 343 | Which of the following statements is/are incorrect? This question has multiple correct options A. Glucose is non reducing sugar B. Sucrose is reducing sugar C. Maltose is non reducing sugar D. Lactose is non reducing sugar |
12 |
| 344 | Match the following. List-I ( quad ) List-II (Monomer) A) Sucrose i) ( beta ) -D-Galactose and ( beta ) -D-Glucose B) Cellulose ii) ( alpha ) -D-Glucose and ( beta ) -D-Fructose c) Starch iii) ( beta ) -D-Glucose D) Lactose iv) ( alpha ) -D-Glucose A. A-i; B-ii; C-iii; D-iv B. A-ii; B-i; C-iii; D-iv c. A-ii; B-iii; C-iv; D-i D. A-iv; B-iii; C-i; D-ii |
12 |
| 345 | Histone proteins are associated with A. DNA B. mRNA c. rRNA D. snRNA E. tRNA |
11 |
| 346 | How many of the following are sources of Vitamin K? Green Leafy vegetables, Fish, Meat, Cereals, milk, Kidney Beans, Cottonseed oil |
12 |
| 347 | Carbohydrates contains carbon, hydrogen, and oxygen molecules. A. True B. False |
12 |
| 348 | Which of the following is the correct statement? A. Starch is a polymer of ( alpha ) – glucose. B. Amylose is not a component of starch. C. Proteins are composed of only one type of amino acid. D. In cyclic structure of fructose, there are five carbon and one oxygen atoms. |
12 |
| 349 | Most abundant fibrous protein in the human body is: A. collagen B. keratin c. elastin D. myosin |
12 |
| 350 | The correct sequence of linkage among N of base, ( C ) of sugar and ( P ) of phosphate in adenosine-5’triphosphate is: A. C-P-N-P-P B. N-P-C-P-P-P c. p-c-N-p-p D. P-P-P-C-N |
12 |
| 351 | The products formed when a pinch of sugar is strongly heated for fifteen minutes in a test tube are: A. carbon and water vapour B. carbon, hydrogen and oxygen c. carbon dioxide and water vapour D. carbon dioxide and hydrogen |
12 |
| 352 | Match the following: Name of the sugar Hydrolysis products A) Sucrose i) Glucose + Fructose Galactose B) Lactose ii) Glucose + Fructose c) Maltose iii) Glucose + Galactose D) Raffinose iv) Glucose + Glucose A. A-iii, B- ii, C-i, D-iv. B. A-ii, B- iii, C-i, D-iv c. A- ii, B- iii, C- iv, D-i D. A- ii, B- iv, C- iii, D-i |
12 |
| 353 | Q. 22 Which of the following carbohydrates are branched polymer of glucose? (a) Amylose (b) Amylopectin (c) Cellulose (d) Glycogen |
11 |
| 354 | During denaturation of proteins, only ……….. structure of protein is retained | 12 |
| 355 | Glucose cannot be classified as: A. hexose B. carbohydrate c. oligosaccharide D. aldose |
12 |
| 356 | An enzyme accelerates a biochemica reaction by A. Increasing substrate movements B. Changing free enzyme c. Production of heat D. Lowering energy of activation |
11 |
| 357 | • 40 Some enzymes are named after the reaction, where they are used. What name is given to the class of enzymes which catalyse the oxidation of one substrate with simultaneous reduction of another substrate? |
11 |
| 358 | Pyrimidine bases present in RNA are: A. Adenine and Guanine B. Thymine and Uraci c. Uracil and Cytosine D. Thymine and Cytosine |
12 |
| 359 | The vitamin having metal atom is? A. Vitamin A B. Vitamin K c. Vitamin ( B_{12} ) D. vitamin C |
12 |
| 360 | The eukaryotic chromosome contains nucleosome spools. A. True B. False |
11 |
| 361 | Anabolism is A. Endergonic process B. Exergonic process C. Bidirectional process D. Destructive process |
11 |
| 362 | Which of the following bond is formed during the condensation of monosaccharides? A. Covalent bond B. Glycosidic bond c. Peptide bond D. lonic bond |
11 |
| 363 | Which of the following statements are correct? This question has multiple correct options A. One mole of ( P h N H N H_{2} ) reacts with 3 mol glucose to form osazone B. One mole of D-fructose reacts with 3 mol ( P h N H N H_{2} ) to form osazone C. One mole of D-2-deoxy glucose reacts with 1 mol ( P h N H N H_{2} ) to form phenylhyrazone D. One mole of D-3-deoxy glucose reacts with 3 mol ( P h N H N H_{2} ) to form osazone |
12 |
| 364 | Enzymes increase the rate of reactions by A. Increasing the free energy of activation. B. Decreasing the energy of activation. C. Changing the equilibrium constant of the reaction. D. Increasing the free energy change of the reaction. |
11 |
| 365 | The fastest acting enzyme, in the biological kingdom, is A . Lipase B. Amylase c. Peptidase D. Carbonic anhydrase |
11 |
| 366 | Guanine is an example of: A. a nitrogenous base B. a nucleoside c. a nucleotide D. phosphate |
12 |
| 367 | Which of the following is a physical property of sugar? A. It is a white crystalline solid. B. Carbon, hydrogen, and oxygen are its constituents. C . It turns black when concentrated ( H_{2} S O_{4} ) reacts with it. D. When heated it decomposes. E. It decomposes readily. |
12 |
| 368 | Which is not correct about monosaccharides? This question has multiple correct options A. Optically active polyhydroxy carbonyl compounds. B. Fructose & glucose can not be distinguish by ( B r_{2} / H_{2} O ) c. Glucose and mannose are anomers. D. Fructose & glucose can be distuinguish by Fehling’s solution |
12 |
| 369 | Which of the following does not give silver mirror test with Tollen’s reagent? A. sucrose B. Glucose c. Fructose D. Lactose |
12 |
| 370 | The total number of amino acids in a molecule of the Hypoglycemic hormone is: A . 30 B . 21 ( c cdot 5 ) D. 27 |
12 |
| 371 | which harmone controls carbohydrate metabolism? | 12 |
| 372 | Function of nucleases is to A. Break the polynucleotide chain by breaking the each terminal nucleotide B. Break phosphodiester bond C . Break peptide bonds D. Break ester bonds |
11 |
| 373 | Define the following with an example of Denatured protein. | 12 |
| 374 | Which of the following amino acid is neutral? A. Aspartic acid B. Glycine c. Lysine D. Arginine |
12 |
| 375 | Hexokinase (Glucose + ATP 一 Glucose ( 6-P+A D P ) ) belongs to the category A. Transferases B. Lysases c. oxidoreductases D. Isomerases |
11 |
| 376 | Which glycosidic linkage is present in Maltose? A ( cdot alpha-D-(+)-g l u operatorname{cose}left(C_{1}right)-O-left(C_{2}right)-beta-D- ) ( (-)-g l u c o s e ) B. ( beta-D-(+)-g l u operatorname{cose}left(C_{1}right)-O-left(C_{4}right)-D-(+)- ) glucose c. ( alpha-D-(+)-g l u c o s eleft(C_{1}right)-O-left(C_{4}right)-D-(+) ) glucose D. ( beta-D-(+)-g l u operatorname{cose}left(C_{1}right)-O-left(C_{4}right)-D-(-)- ) glucose |
12 |
| 377 | Which of the following group/linkage is absent in adenine but present in guanine? A ( . C-N ) в. ( -N H_{2} ) c. ( C=O ) D. ( -C O N H_{2} ) |
12 |
| 378 | Study the structure of maltose and mark the incorrect statement. A. Maltose is composed of two ( alpha-D- ) glucose units B. ( C-1 ) of one glucose is linked to ( C-4 ) of other unit C. It is a non-reducing sugar D. It is a disaccharide |
12 |
| 379 | Give the classification of aminoacids. | 12 |
| 380 | A disaccharide, on hydrolysis, gives: A. two molecules of the same monosaccharide B. one molecule each of the same monosaccharide C. three molecules of the same monosaccharide D. two molecules of the same or one molecule each of two different monosaccharides |
12 |
| 381 | Carbohydrates are commonly found as starch in plant storage organs.Which of the following five properties of starch makes it useful as a storage material? (A) Easily translocated (B) Chemically non-reactive (C) Easily digested by animals (D) Osmotically inactive (E) Synthesized during photosynthesis The useful proeprties are ( A cdot(A),(C) ) and (E) B. (A) and (E) c. (B) and (C) D. (B) and (D) |
11 |
| 382 | Which of the statements about Denaturation’ given below are correct? Statements: (i) Denaturation of proteins causes loss of secondary and tertiary structures of the protein. (ii) Denaturation leads to the conversion of double strand of DNA into single strand. (iii) Denaturation affects primary structure which gets destroyed. A. (ii) and (iii) B. (i) and (iii) c. (i) and (ii) D. (i), (ii) and (iii) |
12 |
| 383 | Ultraviolet light absorbed by nucleic acids is at ( mathbf{A} cdot 26 n m ) B. ( 75 n m ) ( c .260 n m ) D. 1500 nm |
11 |
| 384 | The enzyme, which combines with non- protein part to form a functional enzyme is known as A. Co-enzyme B. Holoenzyme c. Apoenzyme D. Prosthetic group |
11 |
| 385 | The given graph depicts the free energy change before, during and after a biochemical reaction. The effect of a catalytic enzyme can be described by A. Energy decreases at point B. Energy increases at point C. Energy decreases at point D. Energy increases at point 2 E. Energy decreases at point |
11 |
| 386 | Which of the following forms gives osazones different from the other three? A . Fructose B. Glucose c. Galactose D. Mannose |
12 |
| 387 | 109. Helical structure of protein is stabilised by (a) peptide bond (b) hydrogen bond (c) van der Waal’s force (d) dipole association. |
11 |
| 388 | Glycogen is a/an A. Polymer of amino acids. B. Polymer of fatty acids. c. Unsaturated fats. D. Polymer of glucose. |
11 |
| 389 | Vitamin D is also known as: A. growth vitamin B. sunshine vitamin c. reproductive vitamin D. ascorbic acid |
12 |
| 390 | Which statements are correct? This question has multiple correct options A. Lactose is a disaccharide and is a reducing sugar B. ( alpha-D- ) glucopyranoside has an acetal structure and is non-reducing sugar c. Methyl( -alpha-D- )glucopyranose has an acetal structure and is a non-reducing sugar D. ( alpha-D- ) Glucopyranose has a hemiacetal structure and is a reducing sugar |
12 |
| 391 | Why anabolic reactions are endergonic reactions? |
11 |
| 392 | Q.27 Can enzyme be called a polymer? | 11 |
| 393 | Which statements are correct about the figure given. This question has multiple correct options ( A cdot ) It is sucrose B. Due to presence of hemi-acetal linkage, it is nonreducing sugar C. Left side unit is ( alpha ) -D-Glucose and right side unit is ( beta ) -D- Fructose D. Absence of hemi-acetal linkage |
12 |
| 394 | Q.45 Sucrose is dextrorotatory but the mixture obtained after hydrolysis is laevorotatory. Explain. |
12 |
| 395 | Sucrose (cane sugar) is a disaccharide. One molecule of sucrose on hydrolysis gives ……… (a) 2 molecules of glucose (b) 2 molecules of glucose + 1 molecule of fructose (c) 1 molecule of glucose + 1 molecule of fructose (d) 2 molecules of fructose |
11 |
| 396 | Glycosidic linkage is present in: This question has multiple correct options A. sucrose B. starch c. glucose D. fructose |
12 |
| 397 | Enzyme, vitamins and hormones can be classified into a single category of biological chemicals, because all of these A. Decrease metabolism. B. Are conjugated proteins. C. Are exclusively synthesized in the body of a living organism as at presentt D. Help in regulating metabolism |
11 |
| 398 | Invert sugar is: A. a type of cane sugar B. optically inactive form of sugar C. mixture of glucose and galactose D. mixture of glucose and fructose in equimolar quantities |
12 |
| 399 | Which of the following is not a monosaccharide? A. Glucose B. Fructose c. Glyceraldehyde D. sucrose |
12 |
| 400 | Match the columns. | 12 |
| 401 | The vitamin essential for synthesis of lipids is A. Pantothenic acid B. Pyridoxine c. Retinol D. Biotin |
12 |
| 402 | Which one of the following is correct about ( H ) -bonding in nucleotide? A. ( A-T, G-C ) в. ( A-G, T-C ) ( c cdot G-T, A-C ) D. ( A-A, T-T ) |
12 |
| 403 | Within the list shown below, the correct pair of structures of alanine in ( boldsymbol{p} boldsymbol{H} ) range ( 2-4 ) and ( 9-11 ) is: I. ( boldsymbol{H}_{3} boldsymbol{N}^{+} boldsymbol{C H}left(boldsymbol{C H}_{3}right) boldsymbol{C O}_{2} boldsymbol{H} ) II. ( boldsymbol{H}_{2} boldsymbol{N} boldsymbol{C} boldsymbol{H}left(boldsymbol{C} boldsymbol{H}_{3}right) boldsymbol{C} boldsymbol{O}_{2}^{-} ) III. ( boldsymbol{H}_{3} boldsymbol{N}^{+} boldsymbol{C H}left(boldsymbol{C H}_{3}right) boldsymbol{C O}_{2}^{-} ) IV. ( boldsymbol{H}_{2} boldsymbol{N} boldsymbol{C} boldsymbol{H}left(boldsymbol{C} boldsymbol{H}_{3}right) boldsymbol{C} boldsymbol{O}_{2} boldsymbol{H} ) A . ।, ॥ B. ।, III c. ॥, ॥ ॥ D. III, IV |
12 |
| 404 | Match the name of vitamins in column with their sources in column II and mark the appropriate choice. Column I Column II (A) Vitamin ( B_{1} ) (i) Milk, yeast, cereals (B) Vitamin (ii) Meat, fish, egg ( B_{12} ) (C) Vitamin (iii) Carrots, butter, papaya (D) Vitami (iv) Citrus fruits, amla, green leafy ( mathrm{C} quad ) vegetables ( mathbf{A} cdot(A) rightarrow(text { iii) },(B) rightarrow(i v),(C) rightarrow(i),(D) rightarrow(text { ii }) ) B. ( (A) rightarrow(text { ii) },(B) rightarrow(i),(C) rightarrow(i text { i) },(D) rightarrow(i v) ) C ( cdot(A) rightarrow(text { iv ) },(B) rightarrow(text { iii) },(C) rightarrow(text { ii }),(D) rightarrow(i) ) D. (A) ( rightarrow ) (i), (B) ( rightarrow ) (ii), (C) ( rightarrow ) (ii), (D) ( rightarrow ) (iv) |
12 |
| 405 | 34. Insulin : (1) increases blood sugar (2) decreases blood sugar (3) constricts blood vessels (4) stimulates lactation |
12 |
| 406 | Which of the following statement can be related to catabolism? A. It is an exergonic reaction B. It is an endergonic reaction c. It helps to break complex molecules to simple ones. D. Both A and C |
11 |
| 407 | Carbohydrate are stored in human body as the : A . starch B. glucose c. glycogen D. galactose E. Fructose |
12 |
| 408 | The base pairs of DNA are correctly shown as ( A cdot A equiv T ) and ( C=G ) ( B cdot A=T ) and ( C=G ) c. ( A=T ) and ( C equiv G ) D. ( A equiv T ) and ( C equiv G ) |
11 |
| 409 | The information in a genetic nucleic acid resides in A. The number of nucleotides B. The kind of nucleotides c. The sequence nucleotides D. All of the above |
11 |
| 410 | Purine derivative among the bases is: A. thymine B. uraci c. guanine D. cytosine |
12 |
| 411 | Who proposed Lock and key hypothesis to explain the mechanism of enzymatic action? A. Fischer B. Jacob c. Koshland D. Sumner |
11 |
| 412 | J.B. Sumner isolated first enzyme from jack beans as A. Amylase B. Trypsin c. Urease D. Renin |
11 |
| 413 | The effectiveness of an enzyme is affected least by A. Temperature B. Concentration of the substrate c. original activation energy of the system D. Concentration of the enzyme |
11 |
| 414 | Compounds ( (C) ) and ( (D) ) are: ( A ) [ begin{array}{l} text { сно } \ text { соон } end{array} ] в. сно ( _{text {апа }} ) соон СООН ( ^{text {СН }} ) он ( c ) [ begin{array}{l} mathrm{COOH} \ mathrm{COOH} end{array} ] D. [ begin{array}{l} text { соон соон } \ text { соон }^{text {апа }} text { СН }_{2} text { он } end{array} ] |
12 |
| 415 | Vitamins are generally involved in forming component of enzyme called A. Apoenzyme B. Holoenzyme c. Prosthetic group D. Coenzyme and prosthetic group |
11 |
| 416 | Match the compounds in column I with their characteristic(s)/test(s)/reaction(s)/re agent(s)/stereochemistry/isomer(s) given in column II. Matching can be one or more than one. |
12 |
| 417 | Which of the following is found only RNA and not in DNA? A. Adenine B. Thymine c. Guanine D. Uracil |
11 |
| 418 | Which of the following enzyme converts maltose to glucose? A. Invertase B. Zymase c. Maltase D. Diastase |
12 |
| 419 | Which of the following carbohydrates develop blue colour on treatment with iodine solution? A. Glucose B. Sorbose c. starch D. Fructose |
12 |
| 420 | Which of the following is true about alpha amino acids? A. If the amino group at the chiral carbon lies on the left hand side as in L-(-)-glyceride, the amino acid belongs to L-series B. If it is towards right as in D-(+)-glyceraldehyde, it is said to belong to D-series. c. Both of the above D. None of the above |
12 |
| 421 | Which of the following statement is not correct? A. vitamins are synthesized within the body B. hormones are synthesized within the body C. hormones are also known as chemical messengers D. hormones are highly potent and so are produced in small quantities |
12 |
| 422 | The amino acid containing mercaptan unit is: A. leucine B. glutamine c. cysteine D. lysine |
12 |
| 423 | Glucose is stored as glycogen in A. Pancreas B. Bone c. Kidney D. Liver |
11 |
| 424 | The ( 3^{prime}-5^{prime} ) phosphodiester linkages inside a polynucleotide chain serve to join A. One nitrogenous base with pentose sugar B. One DNA strand with the other DNA strand c. one nucleoside with another nucleoside D. One nucleotide with another nucleotide |
11 |
| 425 | High energy bond of ATP are present in between A . c-c B. C-O c. ( c-N ) D. O-P |
11 |
| 426 | A combination of a ribose molecule, a thymine and a sugar molecule will form ( a ) A. Ribosome B. Nucleotide c. Nucleic acid D. ATP E. ADP |
11 |
| 427 | Starch is saccharide. | 12 |
| 428 | Which of the following statements is wrong regarding amino acids? A. The living systems in plants can synthesise essential amino acids B. The living systems in animals can synthesise only essential amino acids C. The living systems in animals can synthesise only non essential amino acids. D. The living systems in plants can synthesise non essential amino acids |
12 |
| 429 | Which of the following carbohydrates is most abundant in nature? A. Glucose B. Fructose c. starch D. Cellulose |
12 |
| 430 | If you study the effect of substrate concentration on an enzymatic reaction, what kind of curve would you obtain? |
11 |
| 431 | The two strands of DNA in the double helix is connected by A. Covalent bonding B. Ionic bonding c. Hydrogen bonding D. Hydrophobic interactions E. Teritary structure |
11 |
| 432 | The receptors for non-steroid peptide hormones are on the : A. plasma membrane B. nuclear envelope c. DNA receptor complex D. peptide chain |
12 |
| 433 | Amylopectin is composed of: ( mathbf{A} cdot alpha-D- ) glucose ( , C_{1}-C_{4} ) and ( C_{1}-C_{6} ) linkages B. ( alpha-D- ) glucose, ( C_{1}-C_{4} ) and ( C_{2}-C_{6} ) linkages ( mathbf{c} cdot beta-D- ) glucose, ( C_{1}-C_{4} ) and ( C_{2}-C_{6} ) linkages D. ( beta-D- ) glucose, ( C_{1}-C_{4} ) and ( C_{1}-C_{6} ) linkages |
12 |
| 434 | Q. 41 During curdling of milk, what happens to sugar present in it: mille |
11 |
| 435 | ( (+)- ) sucrose is made up of : A. D – glucose and L – fructose B. D – glucose and D – fructose c. ( D ) – fructose and ( L ) – glucose D. L- fructose and L- glucose |
12 |
| 436 | Q. 45 Sucrose is dextrorotatory but the mixture obtained after hydrolysis is ysis is laevorotatory. Explain. tura at lucose and the |
11 |
| 437 | Which one has more free energy? A. Reactants B. Transition state of reactants c. Products D. Active site of enzyme |
11 |
| 438 | What is the structural difference between glycogen and starch? |
12 |
| 439 | Which one of the amino acids can be synthesised in the body? A. Alanine B. Lysine c. valine D. Histidine |
12 |
| 440 | Which of the following is a pentose sugar? A. Glucose B. Fructose c. Ribose D. Cellulose |
12 |
| 441 | Which of the following statements are correct? ( mathbf{A} cdot beta-mathrm{D}(+) ) glucopyranose is more stable than ( alpha-mathrm{D}(+) ) glucopyranose B. Invert sugar is laevorotatory C. Dextrose is ( D(+) ) glucose D. Levulose is D(-) fructose |
12 |
| 442 | Which of the following is a female sex hormone? A. Adrenaline B. Estrone c. cortisone D. Testosterone |
12 |
| 443 | Point out the wrong statement about proteins. A. They are nitrogenous organic compounds of high molecular mass. B. They on hydrolysis by enzymes give aminoacids. C. Many of them are enzymes. D. They do not contain polypeptide. |
12 |
| 444 | 0,57 Coagulation coagulation of egg white on boiling is an example of denaturation of rotein. Explain it in terms of structural changes. |
12 |
| 445 | Which of the following is true about vitamins? A. Vitamins in the humanbody are needed in large amounts. B. Vitamins are secreted by ductless glands. C. Vitamins are synthesized by an organisms. D. Vitamins A,D,E and K are fat soluble whereas vitamins of the B group and vitamin C are water soluble |
12 |
| 446 | Write one difference between ( alpha ) -helix and ( beta ) -pleated structures of proteins. |
12 |
| 447 | Assertion D-Fructose is used for sweetening cold drinks but not in hot ones Reason The sweet form is fructopyranose; on increasing temperature causes a shift in the pyranose ( rightleftharpoons ) furanose equilibrium towards the less sweet furanose form A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion C. Assertion is correct but Reason is incorrect D. Assertion is incorrect but Reason is correct |
12 |
| 448 | In which of following cases, both the compounds are examples of reducing sugars? A. Glucose and Sucrose B. Fructose and Maltose c. Fructose and sucrose D. sucrose and Lactose |
12 |
| 449 | The pace setter of the endocrine system in the human body is the endocrine hormone called: A. thyroxin B. insulin c. adrenaline D. secretin |
12 |
| 450 | Q. 21 Prote Proteins can be classified into two types on the basis of their molecular shape, i.e., fibrous proteins and globular proteins. Examples of globular proteins are (a) insulin (b) keratin (c) albumin (d) myosin |
11 |
| 451 | Which of the following polymer is stored in the liver of animals? A. Amylose B. Cellulose c. Amylopectin D. Glycogen |
12 |
| 452 | First discovered enzyme was A. Isomerase B. Transaminase c. zymase D. Transferase |
11 |
| 453 | Part of active site of enzyme, where substrate is supported is A. Catalytic group B. Buttressing group c. Activation chamber D. K constant |
11 |
| 454 | Which of the following is a polysaccharide? A. Starch B. Maltose c. Lactose D. Arabinose |
12 |
| 455 | 70. The essential amino acid among the following is (a) phenylalanine (b) cysteine (c) alanine (d) glycine. (J&KCE |
11 |
| 456 | Q туре your question 3. ( c ) D. |
12 |
| 457 | The solution of iodine in ( K I ) is used to detect a solution of starch and glycogen, as it gives: A. blue colour with starch and red colour with glycogen B. green colour c. green colour with starch blue colour with glycogen D. red colour with starch yellow with glycogen |
12 |
| 458 | Maltose is made up of: A. two ( alpha-D ) – glucose B. normal ( beta-D- ) glucose c. ( alpha- ) and ( beta-D- ) glucose D. fructose |
12 |
| 459 | Phosphorylation of glucose is increased by A. Auxins B. Insulin c. Ethylene D. Traumatic acid |
12 |
| 460 | Which of the following is true? Non-competitive inhibitor differs from a competitive inhibitor in that it A. Reduces the affinity of substrate for enzymes B. Does not alter ( mathrm{K}_{m} ) c. May attach it self to the enzyme at a site other than the active site D. Both B and C |
11 |
| 461 | The graph given shows the effect of substrate concentration on the rate of reaction of the enzyme phosphatase from green gram. What does the graph indicates? A. The rate of enzymes reaction is directly proportional to the substrate concentration. B. Presence of an enzyme inhibitor in the reaction mixture C. Formation of an enzyme substrate complex. D. At higher substrate concentration, the pH increase. |
11 |
| 462 | The ( alpha ) amino acid which contains the aromatic side chain is: A. proline B. tyrosine c. valine D. serine |
12 |
| 463 | 6-amino purine is: A. adenine B. adenosine c. cytidine D. thymidine |
12 |
| 464 | Differentiate between Starch and Glucose. |
12 |
| 465 | Which one of the following is a polysaccharide? A. sucrose B. Cellulose c. Maltose D. Raffinose |
12 |
| 466 | Which one of the following reactions is catalyzed by the enzyme reverse transcriptase? A. Transfer of information from RNA to RNA B. Transfer of information from DNA to RNA c. Transfer of information from Protein to DNA D. Transfer of information from RNA to DNA |
11 |
| 467 | Which vitamins are present in much smaller amounts in cells? A. ( A ) в. ( D ) c. ( B ) and ( C ) D. ( K ) |
12 |
| 468 | If there is ( 20 % ) adenine in DNA, the percentage of guanine will be A . 20% B. 40% c. ( 10 % ) D. None of the above |
11 |
| 469 | Which one given below is a nonreducing sugar? A. Maltose B. Lactose c. Glucose D. sucrose |
12 |
| 470 | Parathyroid hormone (PTH): A. stimulates the release of calcium by the kidneys B. stops the absorption of calcium from the intestine C. causes blood calcium level to decrease D. causes blood phosphate level to decrease |
12 |
| 471 | Q. 30 How do you explain the presence of all the six carbon atoms in glucose in a straight chain? |
11 |
| 472 | Which one of the following is a catabolic process? A. Regulation B. Photosynthesis c. Digestion D. Secretion |
11 |
| 473 | The sequence of bases on ( mathrm{m} ) -RNA molecule synthesized on the GCATATGGA strand of DNA is A. cGuAUACCU в. СGтАТАСст c. тАсяссятс D. Атсясятт |
12 |
| 474 | What do you understand by the term glycosidic linkage? | 12 |
| 475 | Name the products of hydrolysis of sucrose. |
12 |
| 476 | The carbohydrate used as storage molecule in animal is: A. sucrose B. glycogen c. maltose D. glucose E. fructose |
12 |
| 477 | Question 9. What happens when D-glucose is treated with the following reagents? (i) HI (i) Bromine water (ii) HNO O HI being a strong reducing agent, converts all functional groups into alkanes. (ii) Br, is mild oxidising agent and converts-CHO group into -COOH group (i.e, partial oxidation) (iii) HNO, being a strong oxidising agent converts -CHO as well as -CH.OH group into -COOH (.e, complete oxidation) |
12 |
| 478 | The chemical messengers produced in ductless glands are: A . vitamins B. lipids c. antibiotics D. hormones |
12 |
| 479 | The peptide linkage is : A . amide B. ether c. ester D. anhydride |
12 |
| 480 | In cellulose, ( D- ) glucose units are joined by? A. ( alpha-1,4 ) glycosidic linkage B. ( beta-1,6 ) glycosidic linkage c. ( beta-1,4 ) glycosidic linkage D. peptide linkage |
12 |
| 481 | Which of the following statement is incorrect? A. Amylose is water soluble component of starch B. Amylopectin is water insoluble component of starch C. ( alpha ) -D Glucose units are present in amylose and amylopectin D. None of these |
12 |
| 482 | Which of the following statements are incorrect about receptor proteins? This question has multiple correct options A. Majority of receptor proteins are embedded in the cell membranes B. The active site of receptor proteins opens on the inside region of the cell C. Chemical messengers are received at the binding sites of receptor proteins D. Shape of receptor doesn’t change during attachment of massenger |
12 |
| 483 | nder what condtions glucose is converted to gluconic acid and saccharide acid? di acid |
11 |
| 484 | Glycogen is a branched chain polymer of Q-D-glucose units in which chain is formed by C1-C4 glycosidic linkage whereas branching occurs by the formation of C1-C6 glycosidic linkage. Structure of glycogen is similar to (1) Amylose (ii) Amylopectin (iii) Cellulose (iv) Glucose |
11 |
| 485 | Which of the following enzyme digests other enzymes? A. Dehydrogenases B. Lipases c. Peptidases D. Aldolases |
11 |
| 486 | Experiments were carried out to investigate the effect of different ( boldsymbol{p} boldsymbol{H} ) values on enzyme activities. (Time and temperature was kept constant) (a) What interpretation can you draw from the graph? (b) What happens to the pepsin reaction between ( p H 4 ) and ( 5 ? ) Why? Observe the given graph and answer: |
11 |
| 487 | Enzymes normally have A. Same pH and temperature optima B. Same pH but different temperature optima C. Different pH but same temperature optima D. Different ( mathrm{pH} ) and temperature optima |
11 |
| 488 | Which of the following pair of vitamin participates as co factors in the cellular oxidation reduction reaction? A. Pyridoxine and folate B. Riboflavin and Cobalamine c. Ascorbate and nicotinamide D. Thiamine and pantothenate |
11 |
| 489 | Histones associated with the genetic material apart from maintaining its also act as A. Modulators B. Apozymes c. Isozymes D. Activators |
11 |
| 490 | (i) Which one of the following is a polysaccharide: Starch, Maltose, Fructose, Glucose (ii) What is the difference between native protein and denatured protein? (iii) Write the name of the vitamin responsible for the coagulation of blood. |
12 |
| 491 | Q.54 How do enzymes help a substrate to be attacked by the reagent effectively? |
11 |
| 492 | The hormone which controls the processes of burning of fats, proteins and carbohydrates and liberates energy in the body is: A. Thyroxine B. Adrenaline c. Insulin D. cortisone |
12 |
| 493 | Nucleic acid was first isolated from pus cells by A. Friedrich Miescher B. Altmann c. waldeyer D. Hoffmeister |
11 |
| 494 | Which of the following differs in nature from others? A. Vasopressin B. Thyroid c. oxytocin D. Insulin |
12 |
| 495 | Assertion A solution of sucrose in water is dextrortatory while on hydrolysis in pressence of little hydrochloric acid, it becomes laveorotatory Reason Sucrose on hydrolysis gives unequal amounts of glucose and fructose as a result of which change in sign of rotation is observed. A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion C. Assertion is correct but Reason is incorrect D. Both Assertion and Reason are incorrect |
12 |
| 496 | 34 Monosaccharides contain carbonyl group hence are classified, as aldose or ketose. The number of carbon atoms present in the monosaccharide molecule are also considered for classification. In which class of monosaccharide will you place fructose? |
12 |
| 497 | Which carbohydrate is used in silvering of mirrors ? A. Fructose B. Glucose c. sucrose D. starch |
12 |
| 498 | The ( p H(p H ) at the isoelectric point) of the given amino acid is : A . 3.22 B. 6.96 ( c .5 .93 ) D. 8.05 |
12 |
| 499 | Q Type your question work up gives: ( A ) ( B ) ( c ) ( D ) |
12 |
| 500 | Assertion Hydrolysis of sucrose brings about a change in sign of rotation from dextro to laevo. Reason Hydrolysis always changes the optical rotation of a compound. A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion c. Assertion is correct but Reason is incorrect D. Both Assertion and Reason are incorrect |
12 |
| 501 | Which bonds stabilizes the fibrous and globular shapes of proteins? This question has multiple correct options A. Hydrogen bonds B. Covalent bonds c. Disulphide linkages D. Van der Waals forces |
12 |
| 502 | 17. Maltose is made of the units (a) A-D glucose and B-D glucose (b) A-D glucose and ß-D fructose (c) A-D glucose and a-D glucose (d) a-D glucose and B-D galactose. |
11 |
| 503 | Pick the correct match. A. Helicase (i) To join nucleotides on DNA B. Gyrase (ii) To open DNA C. Primase (iii) Unwind DNA D. DNA (iv) For RNA printing polymerase III A. A-ii, B-iii, C-iv, D-i B. A-i, B-ii, C-iii, D-iv c. A-ii, B-iv, C-iii, D-i D. A-iv, B-iii, C-i, D-ii |
11 |
| 504 | Write Henderson – Hasselbalch equation? |
12 |
| 505 | The minimum number of carbon atoms that should be present in a monosaccharide is: |
12 |
| 506 | The term feedback refers to the effect of A. Substrate on the rate of enzymatic reaction B. End product on the rate of enzymatic reaction C. Enzyme concentration on its rate of reaction D. An external compound on the rate of enzymatic reaction |
11 |
| 507 | The genetic information to the site of translation is carried by nucleic acid A. DNA B. mRNA c. rRNA D. snRNA E. tRNA |
11 |
| 508 | Observe the given figure and answer the questions given below. Which fraction would you expect to produce most radioactively-labelled protein if labelled amino acids were added? Give a reason for your answer |
11 |
| 509 | Match the following lists | 11 |
| 510 | Question 1. Glucose or sucrose are soluble in water but cyclohexane or benzene (simple six membered ring compounds) are insoluble in water. Explain. Sa Molecules which have polar nature or are capable to form hydrogen bond are generally soluble in water. |
12 |
| 511 | What are nucleic acids? | 12 |
| 512 | Give an example of ¡) Globular proteins. ii) Naturally occurring optically inactive amino acid. |
12 |
| 513 | Which component present in human hair? A. Cellulose B. Keratin c. Mayoglobin D. Albumin |
12 |
| 514 | Which of the following is incorrect? A. Fructose is reducing sugar B. Cellulose has ( beta ) -D Glucose units c. DNA has D-ribose D. Amylopectin is insoluble in water |
12 |
| 515 | Glycosidic linkage present between adjacent glucose units of starch or glycogen is generally A. ( beta 1 longrightarrow 4 ) B . ( alpha 1 longrightarrow 4 ) c. ( alpha 2 rightarrow 1 ) D. ( beta 2 longrightarrow 1 ) |
11 |
| 516 | 7. Which of the following gives positive Fehling’s solution test? (a) Sucrose (b) Glucose (c) Fats (d) Protein |
11 |
| 517 | All monosaccharides containing five or six carbon atoms have: A. open chain structures B. pyranose structure c. furanose structures D. may have pyranose or furanose structures |
12 |
| 518 | Match the column I with column II. | 12 |
| 519 | Carbohydrates contain hydrogen and oxygen atoms in the ratio of A . 1: B. 2: ( c cdot 2: 3 ) D. 1: |
12 |
| 520 | The vitamin which is neither soluble in water nor in fat is: A. Biotin B. Phylloquinone c. Thiamine D. Pyridoxine |
12 |
| 521 | The anticodon transfer RNA for the messenger RNA codon GCA is: A . TGA в. GUT c. AGT D. cGu |
12 |
| 522 | The information from RNA to DNA are transferred by the process, which is called as A. Replication B. Transcription c. Translation D. Reverse transcription |
11 |
| 523 | Which of the following set of three items are true, as each set belongs to the category mentioned against them? A. Lysine, glycine, thiamine – Amino acids B. Myosin, oxytocin and gastrin – Hormones c. Rennin, helicase and hyaluronidase – Enzyme D. optic nerve, oculomotor, vagus – sensory nerves |
11 |
| 524 | Q. 10 Which of the which of the following statements is not true about glucose? (a) It is an aldohexose (b) On heating with HI it forms n-hexane (c) It is present in furanose form (d) It does not give 2,4-DNP test |
12 |
| 525 | 68. In a protein molecule various amino acids are linked together by (a) peptide bond (b) dative bond (c) a-glycosidic bond (d) B-glycosidic bond. |
11 |
| 526 | suon . Amino acids can be classified as a-, B-, -, &- and so on depending upon the relative position of amino group with respect to yl group. Which type of amino acids form polypeptide chain in protein? |
12 |
| 527 | Maltose is hydrolysed to: A. Glucose B. Glucose and Fructose c. Glucose and Galactose D. Fructose |
12 |
| 528 | In the structure of DNA, one-nucleotide purine base joins with pyramid type by which bond? A. Aster B. Weak hydrogen c. Glycosidic D. Peptide |
11 |
| 529 | Why starch turns blue black with iodine ( ? ) |
11 |
| 530 | The important features of genetic code are: a. It is universal b. It is commaless c. It is degenerate d. The third base in the codon is not always specific The correct feature(s) is(are): A. a only B. b, conly c. ( b, c, d ) only D. all of the above |
12 |
| 531 | Which of the following is not an oligosaccharide? A. Xylose B. Maltose c. Raffinose D. stachyrose |
12 |
| 532 | Which one of the following compounds, on transamination, DOES NOT result in one of the genetically-coded 20 amino acids? ( A ) B. ( c ) ( D ) |
12 |
| 533 | For artificial ripening of fruit, which of the following is used? A. Testosterone B. Insulin c. Ethylene D. Estrogen |
12 |
| 534 | Which of the following carbohydrates is not a monosaccharide? A. Glucose B. Fructose c. Galactose D. sucrose |
12 |
| 535 | Cane sugar on hydrolysis gives: A. glucose and galactose B. glucose and fructose c. glucose only D. fructose only |
12 |
| 536 | Which of the following ions can easily cause coagulation of proteins? A. ( A g^{+} ) в. ( N a^{text {t }} ) c. ( M g^{2+} ) D. ( C a^{2} ) |
12 |
| 537 | 59. Но, н н он нон НЕОН НО-но НО-но нь он н — он H CH2OH CH OH The relation between these two structures of glucose H- (a) anomers (c) isomers (b) epimers (d) enantiomers. (BHU) |
11 |
| 538 | 96. An electric current is passed through an aqueous solution of a mixture of alanine (isoelectric point 6.0), glutamic acid (3.2) and arginine (10.7) buffered at pH 6. What is the fate of the three acids? (a) Glutamic acid migrates to anode at pH 6. Arginine is present as a cation and migrates to the cathode. Alanine in a dipolar ion remains uniformly distributed in solution. (b) Glutamic acid migrates to cathode and others remain uniformly distributed in solution. All three remain uniformly distributed in solution. (d) All three move to cathode. (WB JEE) |
11 |
| 539 | Amino acids show amphoteric behaviour. Why? | 12 |
| 540 | (AFMC) 51. Which of the following hexoses will form the same osazone when treated with excess phenyl-hydrazine? (a) D-glucose, D-fructose and D-galactose (b) D-glucose, D-fructose and D-mannose (c) D-glucose, D-mannose and D-galactose (d) D-fructose, D-mannose and D-galactose (BHU) |
11 |
| 541 | CUyuidir. 18 Structure of disaccharide formed by glucose and fructose is given Identify anomeric carbon atoms in monosaccharide units. CH₂OH OHHOH H H bk N OH H2–0 H HO HO/CH2OH OH H нон (a) ‘a’ carbon of glucose and ‘a’ carbon of fructose (b) ‘a’ carbon of glucose and ‘e’ carbon of fructose (c) ‘a’ carbon of glucose and ‘b’ carbon of fructose (d) ‘f carbon of glucose and of carbon of fructose A |
12 |
| 542 | DNA differs from RNA in A . Only Sugar B. Nitrogen base only c. Nitrogen base and sugar D. None of the above |
11 |
| 543 | 157. The number of disulphide linkages present in insulin are (a) 4 (b) 3 (d) 1 (Karnataka CET) (c) 2 |
12 |
| 544 | 25. Benedict’s solution is used to identify (a) lipids (b) proteins (c) reducing sugars (d) polysaccharide. |
11 |
| 545 | Raffinose on hydrolysis does not give : A. Glucose B. Ribose c. Fructose D. Galactose |
12 |
| 546 | One molecule of an enzyme is able to catalyse conversion of two molecules of substrate into products in 5 minutes. Ten molecules of enzyme and 25 molecules of substrate are mixed in a test tube. At the end of 10 minutes the test tube will have A. Products only B. Products and enzymes molecules c. Products and 5 unreacted substrate molecules D. Products, enzyme molecules and 5 molecules of substrate |
11 |
| 547 | Vitamin D is called: A. Ascorbic acid. B. Calciferol or ergocalciferol. C . Thiamine. D. Riboflavin. |
12 |
| 548 | 27. Which one of the following position of carbon in glucopyranose is known as anomeric carbon? (a) C (b) C2 (c) C4 (d) C6 (BHU) |
11 |
| 549 | Which of the following statement is incorrect? A. Glycogen is the carbohydrate resource in human and animals B. Cellulose makes the cells walls of the plants C. Sucrose is the polysaccharides known as invert sugar D. Homopolysaccharides are made up of one type of monosaccharides |
12 |
| 550 | The hormone that prepares the uterus for the implantation of the embryo is: A. Estradiol B. Progesterone c. Insulin D. Androgens |
12 |
| 551 | Write two difference between D.N.A. and R.N.A: |
12 |
| 552 | JUUNI Q. 70 Explain the terms primary and secondary structure of proteins. What is the difference between a-helix and B-pleated sheet structure of proteins? |
12 |
| 553 | ( 6 H_{2} O+6 C O_{2} frac{text {sunlight}}{text {Chlorophyll}} ? ) A. ( C_{6} H_{12} O_{6}+6 O_{2} ) в. ( C_{6} H_{6} O_{6}+8 O_{2} ) c. ( C_{5} H_{12} O_{17}+C O_{2} ) D. ( C_{6} H_{11} O_{17}+H_{2} O ) |
12 |
| 554 | Which of the following is correct for Lactose A. It is nonreducing sugar B. Glycosidic bond [1,4] between glucose and galactose c. Glycosidic bond [1, 4 ] between glucose and fructose D. Glycosidic bond [1,2] between glucose and galactos |
12 |
| 555 | Which of the following sugar is found in ATP? A. Deoxyribose B. Ribose c. Trehalose D. Glucose |
11 |
| 556 | Which is the nitrogenous base present only in RNA, but not in DNA? | 12 |
| 557 | The link between successive generation is provided by A. Nucleus B. Cytoplasm c. Lysosome D. Nucleic acid |
11 |
| 558 | Feulgen test is unique for DNA which is A. Gentian violet B. Neutral red c. Basic fuchsin D. cotton blue |
11 |
| 559 | State True or False. Sucrose do not undergo hydrolysis. A. True B. False |
12 |
| 560 | Which sugar is present in nucleic acid A. Pentose B. Hexose c. Fructose D. Glucose |
11 |
| 561 | On hydrolysis of starch, we finally get: A. glucose and fructose B. glucose c. fructose D. sucrose |
12 |
| 562 | The hormone that helps in the conversion of glucose into glycogen is: A. cortisone B. bile acids c. adrenaline D. insulin |
12 |
| 563 | Which one is not a constituent of nucleic acid? A . Uraci B. Guanidine c. Phosphoric acid D. Ribose sugar |
12 |
| 564 | Starch is composed of two polysaccharides namely: A. amylopectin and glycogen B. amylose and glycogen c. amylose and amylopectin D. amylose and amylopectin and glycogen |
12 |
| 565 | Enzyme facilitates a reaction through A. Reduction in activation energy B. Increase in activation energy C. Altering ph D. Altering temperature |
11 |
| 566 | Q. 52 What are glycosidic linkages? In which type of biomolecules are they present? Ane kane between mansarcharides de tonyina linkane formed by the loss of a water |
12 |
| 567 | Classify the following proteins (a) Keratin (b) Haemoglobin ( (c) ) Albumin (d) Myosin (e) Collagen Insulin |
12 |
| 568 | Identify the terms related to proteins: This question has multiple correct options A. zwitter ions B. peptide bond c. saccharides D. fermentation |
12 |
| 569 | The peptide linkage formed between glycine ( left(N H_{2} C H_{2} C O O Hright) ) and alanine ( left(N H_{2}right)left(C H_{3}right) C H C O O H ) to give glycylalanine can be shown as: A. ( N H_{2}-C H_{2}-N H-C_{1} H-C O O H ) [ C H_{3} ] в. ( N H_{2}-C H_{2}-C O N H-_{left{_{H_{3}}right.}^{C} H- ) СООН c. ( H_{2} N C O C H_{2}-C_{C H_{3}} H-C O N H_{2} ) D. ( H O O C-C H_{2}-N H-N H-C_{I}^{C} H-C O O H ) |
12 |
| 570 | Compound ( A ) should be: A. ( D- ) glucose B. ( D ) – fructose c. ( L- ) glucose D. ( L ) -fructose |
12 |
| 571 | An example for homopolysaccharide is/are: This question has multiple correct options A. sucrose B. cellulose c. mannose D. starch |
12 |
| 572 | Which of the following is not a sugar? A. Sucrose B. Glucose C. Fructose D. cellulose |
12 |
| 573 | The non-protein component in enzymes, which is necessary for its biological activity, is called: A . nucleic acid B. lipid c. phosphoric acid D. coenzyme |
12 |
| 574 | Write chemical reaction of glucose with ( boldsymbol{H I} ) |
12 |
| 575 | The proteins associated with nucleic acids are A. Scleroproteins B. Albumins c. Histones D. Globulins E. Lipoproteins |
11 |
| 576 | The general formula of carbohydrates is: A ( cdot C_{n} H_{2 n+1} O ) в. ( C_{n} H_{2 n} O ) ( mathbf{c} cdot C_{n}left(H_{2} Oright)_{n} ) D. ( C_{n}left(H_{2} Oright)_{2 n} ) |
12 |
| 577 | Q. 20 Carbohydrates are classified on the basis of their behaviour on hydrolysis and also as reducing or non-reducing sugar. Sucrose is a ……… (a) monosaccharide (b) disaccharide (c) reducing sugar (d) non-reducing sugar |
11 |
| 578 | Which of the following statements is not correct about sucrose? A. It does not posses a free aldehydic (or) ketonic group B. On hydrolysis, it produce invert sugar C. It is a D-glucoside D. It undergoes mutarotation |
12 |
| 579 | Which of the following compound is not a vitamin? A . niacin B. riboflavin c. thiamine D. guanine |
12 |
| 580 | Which of the following is produced only by plants? A. Starch B. Glycogen c. cholesterol D. Triglycerides |
11 |
| 581 | Arrange the following compounds in descending order on the basis of number of carbon atoms present in them. (A) Palmitic acid (B) Serine Ribose (D) Arachidoric acid Glucose ( A cdot D C A B E ) B. B C E A D c. D A E C B D. ( C ) B A D E |
11 |
| 582 | Glycogen is a branched chain polymer of C-D-glucose units in which chain is formed by C1-C4 glycosidic linkage whereas branching occurs by the formation of C1-C6 glycosidic linkage. Structure of glycogen is similar to (i) Amylose (ii) Amylopectin (iii) Cellulose (iv) Glucose |
11 |
| 583 | Which of the following is the use of gum arabic? A. Food item B. Fibre c. Thickening agent D. Dye |
11 |
| 584 | Write the important structural and functional differences between DNA and RNA. |
12 |
| 585 | Classify the following into monosaccharides and disaccharides. Ribose, 2-deoxyribose, maltose, galactose, fructose and lactose. |
12 |
| 586 | Which of the following statements is not true about sucrose? A. On hydrolysis, it produces glucose and fructose. B. The glycosidic linkage is present between ( C_{1} ) of ( alpha ) glucose and ( C_{1} ) of ( beta ) – fructose. C. It is also named as invert sugar. D. It is a non reducing sugar. |
12 |
| 587 | Which of the following acids is a vitamin? A. Aspartic acid B. Ascorbic acid c. Adipic acid D. Saccharic acid |
12 |
| 588 | 30. The glycosidic linkage involved in linking the glucose units in amylose part of starch is (a) C-CAB linkage (b) C-Co a linkage (c) C-C, a linkage (d) C.-C. B linkage (e) C-C4 a linkage. (Kerala PMT) |
11 |
| 589 | A dextrorotatory sugar, present in fruits, is: A. glucose B. fructose c. cellulose D. starch |
12 |
| 590 | Which of the following vitamins is water soluble? A. Vitamin E B. Vitamin D c. Riboflavin D. Retinol |
12 |
| 591 | Starch is used to test even the small amounts of A. sucrose in aqueous solution B. glucose in aqueous solution C . ( I_{2} ) in aqueous solution D. maltose in aqueous solution |
12 |
| 592 | How are vitamins classified? Name the vitamin responsible for the coagulation of blood. |
12 |
| 593 | Which one is a conjugate enzyme? A. succinate dehydrogenase B. Urease c. Trypsin D. Both A and B |
11 |
| 594 | Which statement is incorrect about peptide bond? [ -C-ddot{N} H-(text { peptide bond }) ] A. ( C N ) bond length in patients is longer than the usual bond length of N-bond в. о spectroscopic analysis show planar structure c. ( C N ) bond length in proteins is smaller than usual bond length of ( C N ) bond D. None of above |
12 |
| 595 | Which of the following is pyrimidine base? A. Adenine B. Guanine c. Uracil D. All the above |
12 |
| 596 | Alanine forms Zwitter ion which exists as ( A ) ( C H_{3} C^{text {ему }} H C O O^{-} ) in acidic medium в. ( C H_{3} C^{text {емуз }} H C O O H ) in a medium of ( p H=4 ) c. ( C H_{3} C H C O O^{-} ) Niz in a medium of ( p H=1 ) D. ( C H_{3} C H C O O^{-} ) in a medium of ( p H=2 ) |
12 |
| 597 | Sucrose (cane sugar) is a disaccharide. One molecule of sucrose on hydrolysis gives: A. 2 molecules of glucose B. 2 molecules of glucose + 1 molecule of fructose c. 1 molecule of glucose +1 molecule of fructose D. 2 molecules of fructose |
12 |
| 598 | 43. Glucose does not react with (a) Bry/H2O (b) H NOH (c) HI (d) NaHSO3 (e) CH3-C0-0_CO_CH2 |
11 |
| 599 | The amino acid which is not optically active is: A . lactic acid B. serine c. alanine D. glycine |
12 |
| 600 | List the salient features of double helix structure of DNA. |
11 |
| 601 | Which of the following carbohydrate is essential constituent of plant cell wall? A. Starch B. Sucrose c. Cellulose D. Maltose |
12 |
| 602 | The sequence from ( (boldsymbol{A}) ) to ( (boldsymbol{D}+boldsymbol{E}) ) is called: A. Wohl’s method B. Ruff method c. Kiliani’s method D. Ekenstein method |
12 |
| 603 | Glycogen, a naturally occurring polymer stored in animals is a: A. monosaccharide B. disaccharide c. trisaccharide D. polysaccharide |
12 |
| 604 | The stored food material in plants A. Starch B. Glycogen c. Glucose D. sucrose |
11 |
| 605 | In ( 1938, ) Max Perutz a political refugee at Cambridge University published Xray photograph crystal data for ( ldots ldots . . . . ) and proteins. A. Haemoglobin and pepsin B. Pepsin and papain c. Myoglobin and haemoglobin D. Immunoglobulin and haemoglobin |
11 |
| 606 | Shanti, a domestic helper of Mrs. Anuradha, fainted while mopping the floor. Mrs. Anuradha immediately took her to the nearby hospital where she was diagnosed to be severely ‘anaemic’. The doctor prescribed an iron rich diet and multivitamins supplement to her. Mr.s Anuradha supported her financially to get the medicines. After a month, Shanti was diagnosed to be normal. (i) What values are displayed by Mrs. Anuradha? (ii) Name the vitamin whose deficiency causes ‘pernicious anaemia! (iii) Give an example of a water soluble vitamin |
12 |
| 607 | are to proteins as are to nucleic acids A. Sugars; lipids B. Amino acids; hydrogen bonds C. Sugars, proteins D. Amino acids, nucleotides |
11 |
| 608 | Carbohydrates such as glucose, fructose and sucrose are sweet in taste. But, starch has bland taste though it is a carbohydrate. How do you account for this? |
12 |
| 609 | Q. 23 Amino acids are classified as acidic, basic or neutral depending upon the relative number of amino and carboxyl groups in their molecule. Which of the following are acidic? (a) (CH),CH-CH-COOH NH, (b) HOOC-CHU-CH-CH-COOH NH, (c) H2N-CH,-CH, CH, COOH (d) HOOC–CH = CH –COOH NH, |
12 |
| 610 | How are proteins denatured? | 12 |
| 611 | Which of the given statements is INCORRECT about glycogen? A. It is a straight chain polymer similar to amylose B. only ( alpha- ) linkages are present in the molecule c. It is present in animal cells. D. It is present in some yeast and fungi |
12 |
| 612 | The most common reagent for qualitative and quantitative analysis of amino acids is: A. Ninhydrin reagent B. Millon’s reagent c. sangars reagent D. Edmanns reagent |
12 |
| 613 | TMV contains ( A cdot D N A ) B. RNA + protein C. DNA + RNA D. DNA + protein |
11 |
| 614 | On hydrolysis of starch, we finally get: A. Glucose B. Fructose c. Both (a) and (b) D. sucrose |
12 |
| 615 | Which of the following is a polysaccharide? A. Glucose B. Fructose c. sucrose D. Cellulose |
11 |
| 616 | Match the compounds in column I with their characteristic(s)/test(s)/reaction(s)/re agent(s)/stereochemistry/isomer(s) given in column II. Matching can be one or more than one. |
12 |
| 617 | What is the minimum number of carbon atoms to be present in a carbohydrate? ( A cdot 2 ) B. 3 ( c cdot 4 ) D. 6 |
12 |
| 618 | Consider the double helix structure of DNA. In this base pairs are present A. part of the back bone structure B. inside the helix c. outside the helix D. none of these |
12 |
| 619 | The fundamental building block of protein is: A. Nitrogen B. ( N H_{2} ) group c. cooH group D. Amino acid |
11 |
| 620 | The negative effect of excessive heat on enzyme function is that A. It alters the three-dimensional shape of the enzyme B. It alters the amino acid sequence of the enzyme C. It alters the composition of the active site of the enzyme D. It alters the shape of the substrate molecule E. It alters the chemical identity of the substrate |
11 |
| 621 | Which is a natural polymer? A. Polythene B. Cellulose c. PVC D. Teflon |
12 |
| 622 | Only RNA contains which of the following base? A. Thymine B. Uraci c. Adenine D. Cytosine |
11 |
| 623 | Which of the following statement(s) is/are incorrect? I. Cellulose is a polysaccharide composed of a large number of ( beta-D ) glucose units. II. ( beta ) -D-glucose units in cellulose are joined by ( beta ) -glycosidic linkages. III. Starch is a mixture of amylose and amylopectin. IV. Amylose is a branched chain polysaccharide. V. Amylopectin is a linear polysaccharide. A . only B. only III c. ॥ and III D. IV and v |
12 |
| 624 | Name the steps in the manufacture of common sugar from sugarcane and explain the first step. |
12 |
| 625 | Which of the following hormone, is responsible for the growth of animals? A . Auxin B. Insulin c. Adrenaline D. Somatotropin |
12 |
| 626 | 0.39 a-helix is a secondary structure of proteins formed by twisting of polypeptide chain into right handed screw like structure. Which type of interactions are responsible for making the a-helix structure stable? |
12 |
| 627 | Reducing sugar can reduce: A. Aldehydes to alcohols B. Ferric salts to ferrous salts C. Chlorates to chlorides D. Fehling solution to cuprous oxide |
12 |
| 628 | The ratio of the number of ketonic groups in cytosine, thymine and uracil is: A ( cdot 1: 2: 2 ) B. 2: 1: 2 c. 2: 2: 1 D. 1: 1: 1 |
12 |
| 629 | Write the functions of the following vitamins: (i) Vitamin A (ii) Vitamin D (iii) Vitamin E (iv) Vitamin K |
12 |
| 630 | Chemical reactions require energy for A. Oxidation B. Entropy c. Activation D. Enthalpy |
11 |
| 631 | In Fibrous proteins,polypeptide chains are held together by: A. hydrogen bonds B. disulphide bonds c. both ( A ) and ( B ) D. none of these |
12 |
| 632 | Synthesis of each molecule of glucose in photosynthesis involves: A. 6 molecules of ATP B. 18 molecules of ATP c. 10 molecules of ATP D. 8 molecules of ATP |
12 |
| 633 | Which bond in B-DNA will have to be rotated to convert it from syn to anti conformation? A. Hydrogen bond B. Glycosidic bond c. Phosphodiester D. Hydropbobic |
11 |
| 634 | In fructose and glucose the possible optical isomers are: A. 12,12 B. 8, 16 ( c cdot 16,8 ) D. 4, 12 |
12 |
| 635 | Number of hydrogen bonds between guanine and thymine is: A. 0 B. 3 ( c ) ( D ) |
12 |
| 636 | Which of the following enzymes hydrolyse proteins to ( alpha ) – amino acids? A. trypsin B. pepsin c. chymotrypsin D. all of the above |
12 |
| 637 | reactions they Q.59 Match the following enzymes given in Column I with the reaction catalyse given in Column II. Column Column II (Enzymes) (Reactions) A. Invertase 11. Decomposition of urea into NH, and CO, B Maltase 2 Conversion of glucose into ethyl alcohol C Pepsin 3. Hydrolysis of maltose into glucose. D. Urease 4. Hydrolysis of cane sugar. E. Zymase 5. Hydrolysis of proteins into peptides. |
12 |
| 638 | What structural feature distinguishes glycine from other natural ( alpha ) aminoacids? A. It is optically inactive. B. It contains aromatic group. c. It is a dicarboxylic acid. D. It has a secondary amine. |
12 |
| 639 | Oroducluse. Question 10. Protein found in a biological system with a unique three- dimensional structure and biological activity is called a native protein. When a protein in its native form, is subjected to physical change like change in temperature or a chemical change like change in pH denaturation of protein takes place. Explain the cause. |
12 |
| 640 | What is the meaning of turnover with reference to enzyme? A. The number of substrate molecules that molecule of an enzyme converts into products per minute. B. The number of substrate molecules that molecule of an enzyme converts into products per day. C. The number of substrate molecules that molecule of an enzyme converts into products per hour. D. The number of substrate molecules that molecule of an enzyme converts into products per second. |
11 |
| 641 | The melting point of amino acids are higher than the corresponding haloacids because? A. amino acids exist as zwitter ions resulting in strong dipole-dipole attraction B. amino acids are optically active C. due to higher molecular mass of ( -N H_{2} ) group molecular mass of amino acids is higher D. they interact with water more than halo-acids and have salt like structure |
12 |
| 642 | Question 4. Classify the following into monosaccharides and disaccharides. Ribose, 2-deoxyribose, maltose, galactose, fructose and lactose. Monosaccharides do not undergo hydrolysis whereas disaccharides give two molecules of monosaccharides when subjected to hydrolysis. |
11 |
| 643 | 0.12 DNA and RNA contain four bases each. Which of the following bases in not present in RNA? (a) Adenine (b) Uracil (c) Thymine (d) Cytosine |
11 |
| 644 | Two types of nucleic acids are DNA and A. RNA B. chromosome c. Ribosome D. mRNA |
11 |
| 645 | Differentiate between ATP and AlDS based on their abbreviations. |
11 |
| 646 | 50. Hydrolysis of sucrose is called (a) inversion (b) esterification (c) hydration (d) saponification. |
11 |
| 647 | Which sugar is known as milk sugar? A. Maltose B. Lactose c. Glucose D. Fructose |
12 |
| 648 | Cheese is a A. Glubular protein B. Conjugated protein C. Denatured protein D. Derived protein |
12 |
| 649 | Which set of terms correctly identifies the carbohydrate shown? (1) Pentose (2) Pentulose (3) Hexulose (4) Hexose (5) Aldose (6) Ketose Pyranose (8) Furanose A. 2,6,8 в. 2,6,7 ( c cdot 1,5,8 ) D. A set of terms other than these |
12 |
| 650 | On the basis of ‘sugar’ differentiate D.N.A. and R.N.A: |
12 |
| 651 | In RNA, nucleotides are bonded by ( A . ) H bonds B. Phospodiester bonds c. lonic bonds D. None of the above |
11 |
| 652 | e reactions they Q.59 Match the following enzymes given in Column I with the reaction catalyse given in Column II. Column Column II (Enzymes) (Reactions) A. Invertase 11. Decomposition of urea into NHg and CO, B Maltase 2. Conversion of glucose into ethyl alcohol. C Pepsin 3. Hydrolysis of maltose into glucose. D. Urease 4. Hydrolysis of cane sugar. Zymase 5. Hydrolysis of proteins into peptides. E. Zumac |
11 |
| 653 | The commonest disaccharide has the molecular formula A. ( C_{10} H_{18} O_{19} ) В . ( C_{10} mathrm{H}_{20} mathrm{O}_{10} ) c. ( C_{11} H_{22} O_{11} ) D. ( C_{12} H_{22} O_{11} ) |
12 |
| 654 | Write the differences between DNA and RNA. |
11 |
| 655 | The nitrogeneous base present only in RNA is? A. Guanine B. Adenine c. cytosine D. Uracil E. Thymine |
12 |
| 656 | Proteins give a red precipitate with Millon’s reagent. The reagent is : A. mercurous and mercuric nitrate and nitrites in ( H N O_{3} ) B. mercurous and mercuric chloride in ( H C l ) c. mercurous and mercuric chloride in ( H N O_{3} ) D. none of the above |
12 |
| 657 | The secondary structure of a protein refers to: A ( . alpha ) -helical back bone B. hydrophobic interations C. Sequence of ( alpha ) -amino acids D. fixed configuration of the polypeptide backbone |
12 |
| 658 | Assertion Globular proteins are highly branched proteins usually soluble in water. Reason Insulin and Albumin are the common fibrous proteins. A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion c. Assertion is correct but Reason is incorrect D. Both Assertion and Reason are incorrect |
12 |
| 659 | Which one is not a co-factor? A. Coenzyme B. Apoenzyme c. Prosthetic group D. Metal ion |
11 |
| 660 | Compare vitamin (Part I) with its deficiency disease (Part II) Part I Part II A. Vitamin – ( B_{12} ) 1.Sterility B. Vitamin- ( B_{6} ) 2. Haemorrhagic condition ( begin{array}{ll}text { C. Vitamin }-E & text { 3. Pernicious anaemia }end{array} ) Vitamin – ( K quad ) 4. Skin disease ( D ) A ( cdot ) A- ( -1 ; ) B-2; ( c-3 ; D-4 ) c. ( A-3 ; B-4 ; C-1 ; D-2 ) D. A-3; B-4; C-2; D-1 |
12 |
| 661 | Nucleic acids occur in A. Viruses only B. Bacteria only C. Mammals only D. All forms of life |
11 |
| 662 | Match the enzymes in column I with their respective biochemical reactions in column II. Choose the correct combination from. Column I (P) (i) removal of phosphory Transaminases acid group from a specific amino (Q) Protein (ii) removal of ( alpha ) -amino group Kinases acid ( quad ) from a specific amino (R) Protein (iii) addition of phosphoryl Phosphatases froup to a specific amino acid ( (s) ) (iv) interconversion of optical Dehydrogenases isomers (v) oxidation and reduction of substrates A. P-iv, Q-ii, R-iii, S-v B. P-ii, Q-i, R-ii, S-iv c. P-ii, Q-iii, R-i, S-v D. P-v, Q-ii, R-iii, S-i |
11 |
| 663 | • oo on the basis of which evidences D-glucose was assigned the following structure? CHO (CHOH)4 CH,OH |
12 |
| 664 | is rich in source of vitamin C. |
12 |
| 665 | 88. Simplest biological amino acid is (a) alanine (b) lysine (c) histidine (d) glycine. |
11 |
| 666 | The contractile protein of skeletal muscle involving ATPase activity is A. ( alpha ) – Actinin B. Tro ponin c. Tropomyosin D. Myosin |
11 |
| 667 | What are the catalytic amino acids of chymotrypsin? | 12 |
| 668 | The chemical name of vitamin D is: A. Retinol B. Ferridoxin c. calciferol D. Ergosterol |
12 |
| 669 | 8.42 How do you explain the presence of five -OH groups in glucose molecule? |
11 |
| 670 | Diastase enzyme converts to A. glucose to ethyl alcohol B. starch to maltose c. maltose to glucose D. sucrose to glucose |
12 |
| 671 | Study of the relationship of energy and transformation of energy in living organisms is known as: A. catabolise energetic B. bioenergetics c. broken energetic D. anabolic energetiç |
12 |
| 672 | How many moles of acetic anhydride ( left(A c_{2} Oright) ) is needed to react completely with sucrose? ( A cdot 8 ) B. 6 ( c cdot 4 ) D. |
12 |
| 673 | Insulin production and its action in human body are responsible for the level of diabetes. This compound belongs to which of the following categories? A. A coenzyme B. A hormone c. An enzyme D. An antibiotic |
12 |
| 674 | Which of the following is not an attribute of enzymes? A. They are proteinaceous in nature. B. They speed up the rate of biochemical reactions c. They are specific in nature. D. They are used up in reactions |
11 |
| 675 | In Insulin molecule there are two chains A and B. “A” contains “X” amino acids & “B” contains “Y” amino acids. The values of ( X ) and ( Y ) are: A. 21, 31 B. 28, 26 c. 21,30 D. 32, 34 |
12 |
| 676 | 22. Glucose when reduced with HI and red phosphorus gives (a) n-hexane (b) n-heptane (C) n-pentane (d) n-octane. |
11 |
| 677 | NAD is A. Nicotinamide adenosine diphosphate B. Nicotine adenosine phosphate C. Nicotinamide adenine dinucleotide D. None of the above |
11 |
| 678 | The enzyme which combines with a nonprotein prosthetic group to form a functional enzyme is called A. Apoenzyme B. Holoenzyme c. coenzyme D. Proenzyme |
11 |
| 679 | Q. 32 Name the linkage connecting monosa the linkage connecting monosaccharide units in polysaccharides. Ans. Glycosidic link |
11 |
| 680 | Which of the following is the correct statement about I and II? (1) ( (Pi) ) A. I is reducing sugar B. II is reducing sugar c. 18 II both are reducing sugar D. None of the two is reducing sugar |
12 |
| 681 | Steroid nucleus contains: A. Two cyclohexane and two cyclopentane rings B. Three cyclohexane and two cylopentane rings c. Four cyclohexane rings only D. Three cyclohexane and one cyclopentane rings |
12 |
| 682 | The minimum number of carbon atoms that should be present in a monosaccharide is : ( A cdot 2 ) B. 3 ( c cdot 4 ) D. 6 |
12 |
| 683 | Which two of the following aldohexoses give the same osazone derivative? A. I and IV B. I and III c. Il and III D. III and IV |
12 |
| 684 | Which of the following has been used in the manufacture of non-inflammable photographic films? A. Cellulose nitrate B. Cellulose xanthate c. cellulose perchlorate D. Cellulose acetate |
12 |
| 685 | Insulin molecule contains ( S-S ) linkages. One ( S-S ) linkage is within a chain, which is numbered as: A . ( 19-20 ) B. 7-7 ( c cdot 6-11 ) D. all of the above |
12 |
| 686 | PMO, DUIVEDN) 74. The following tripeptide can be synthesized from the following amino acids HO Me H HN * NỀN OH (a) Glycine, Leucine and Alanine (b) Alanine, Isoleucine and Glycine (c) Valine, Alanine and Glycine (d) Alanine, Serine and Glycine. (J & K CET) |
11 |
| 687 | Nucleic acids are the polymers of A. Nucleosides B. Nucleotides c. Nitrogenous bases D. sugars |
11 |
| 688 | Which one of the following hydrolyze internal phosphodiester bonds in a polynucleotide chain? A . Lipase B. Protease c. Exonuclease D. Endonuclease |
11 |
| 689 | Sucrose is a non reducing sugar due to : A . ( 1-2 ) linkage B. 1-4 linkage c. ( 1-5 ) linkage D. 1-6 linkage |
12 |
| 690 | 1 mole of stachyose on hydrolysis yields: A. 1 mole of glucose +1 mole of fructose +2 mole of galactose B. 2 mole of glucose + 1 mole of fructose + 1 mole of galactose c. 1 mole of glucose +2 mole of fructose +1 mole of galactose D. 2 mole of glucose +2 mole of fructose |
12 |
| 691 | What is Essential and Non essential amino acid? |
12 |
| 692 | The secondary structure of a protein refers to? A. Hydrophobic interactions B. Sequence of ( alpha ) -amino acids C. Fixed configuration of the polypeptide backbone D. ( alpha ) -helical backbone |
12 |
| 693 | The process by which synthesis of protein takes place based on the genetic information present in ( mathrm{m} ) -RNA is called : A. translation B. transcription c. replication D. messenger hypothesis |
12 |
| 694 | NADP is ( A cdot ) A coenzyme B. A part of tRNA C. An enzyme D. A part of rRNA |
11 |
| 695 | Q. 36 Aldopentoses named as ribose and 2-deoxyribose are found in nucleic acids. What is their relative configuration? |
12 |
| 696 | Which of the following enzymes are not proteinaceous in nature? A. Kinetase B. Ribozyme c. carboxylase D. Catalase |
11 |
| 697 | Which carbohydrate does not have ( C_{x}left(H_{2} Oright)_{y} ) general formula? A . Melitriose B. stachyose C . Fructose D. Rhamnose |
12 |
| 698 | Glucose and fructose are both monosaccharides. A. True B. False |
12 |
| 699 | Sucrose on hydrolysis gives: A. glucose and maltose B. glucose and lactose c. glucose and fructose D. only glucose |
12 |
| 700 | The most abundant protein is A. Rubisco B. Haemoglobin C. Ferredoxin D. cytochrome |
11 |
| 701 | Consider the statements about cellulose. I. It is the principle structural component of vegetable matter. II. Wood has ( 40-50 % ) cellulose. III. Cotton has ( 90 % ) cellulose. IV. Cellulose is formed in the photosynthesis process. The incorrect statements is/are: A. only I B. only II and III c. only I, Il and IV D. none of the above |
12 |
| 702 | The total number of S-S bonds in a molecule of Insulin is: ( A cdot 2 ) B. 3 ( c cdot 4 ) D. |
12 |
| 703 | Nucleic acid are A. mega molecules B. macro molecules C. micro molecules D. meso molecules |
11 |
| 704 | Consider the given statements about polysaccharides. I. These are amorphous solids II. These are insoluble in water III. These are sugars The incorrect statements is/are: A . only III B. II and III c. I and III D. All |
12 |
| 705 | Describe in words the atomic composition denoted by chemical formula ( C_{12} H_{22} O_{11} ) |
12 |
| 706 | Biomolecules are A. inorganic materials B. organic materials C . all the carbon compounds obtained from living tissues D. only DNA and RNA |
11 |
| 707 | Catabolic reactions are exergonic reactions. Justify the statement with reason. |
11 |
| 708 | The sex hormone which controls the development and maintenance of pregnancy is: A. Cortisone B. Thyroxine c. Progesterone D. Estrone |
12 |
| 709 | Which of the following is a polysaccharide? A. Maltose B. Raffinose c. Glycogen D. Galactose |
12 |
| 710 | The human body does not produce: A. Enzymes B. DNA c. Vitamins D. Hormones |
12 |
| 711 | In 1930 , John Northrop crystallized which of the following enzyme as a protein? A. Pepsin B. Renin c. Amylase D. Trypsin |
11 |
| 712 | Urethane is: в. [ mathrm{H}_{2} mathrm{N}-mathrm{C}-mathrm{OH} ] c. ( H O-C equiv N ) D. [ mathrm{H}_{2} mathrm{N}-underset{mathrm{O}}{|}-mathrm{OC}_{2} mathrm{H}_{5} ] |
12 |
| 713 | Protein synthesis in living cells is also called, A. Transcription B. Translation c. Replication D. Duplication |
12 |
| 714 | During denaturation of proteins which structure is destroyed? A. secondaary B. primary c. tertiary D. secondary and tertiary |
12 |
| 715 | Fibrous and globular shapes comes under which structure of proteins? A. Primary B. Secondary c. Tertiary D. Quaternary |
12 |
| 716 | Who conducted in vitro synthesis of DNA ? |
11 |
| 717 | Which of the following has coenzyme activity? A. Nicotinamide B. Purine c. Pyrimidine D. Both B and C |
11 |
| 718 | Spoilage of food material is prevented in cold storage due to A. Reduced respiration at low temperature B. Reduced enzyme activity in food articles c. Reduced enzyme activity in microbes as well as food articles D. Purified nature of air |
11 |
| 719 | Protein is a polymer of : A. Glucose B. Terephthalic acid C. Amino acid D. Glycol |
12 |
| 720 | Which amino acid is achiral? A. Alanine B. Valine c. Proline D. Glycine |
12 |
| 721 | Write differences between primary metabolism and secondary metabolism. |
11 |
| 722 | Q. 21 Proteins can be classified into two ty an be classified into two types on the basis of their molecular e, fibrous proteins and globular proteins. Examples of globular proteins are (a) insulin (b) keratin (c) albumin (d) myosin |
12 |
| 723 | Chitin occurs in the wall of A. Bacteria B. Algae c. Fungi D. Yeast |
11 |
| 724 | Q. 68 On the basis of which evidences D-glucose the basis of which evidences D-glucose was assigned the following structure? CHO (CHOH)4 CH OH |
11 |
| 725 | Cobalt as a rare element is essential in the synthesis of this vitamin A. ( C ) в. ( D ) c. ( B_{1} ) D. ( B_{12} ) |
12 |
| 726 | The transcription product responsible for encoding proteins to be translated is ( A . ) mRNA B. rRNA c. tRNA D. DNA E. Nucleolus |
11 |
| 727 | Explain the functions of polysaccharides. | 12 |
| 728 | Match the following: List – I List – II A. Vitamin B ( _{1} ) 1. Riboflavin B. Vitamin B 2. Pantothenic acid C. Vitamin B ( _{3} ) 3. Niacin D. Vitamin B ( _{5} ) 4. Thiamine B. A – 4, B -1, C – 2, D – 3 c. ( A-3, B-4, C-2, D-1 ) D. A – ( 4, ) B- ( 3, ) C-1, D-2 |
12 |
| 729 | 0.48 Protein found in a biological system with a unique three-dimensional structure and biological activity is called a native protein. When a protein in its native form, is subjected to a physical change like change in temperature or a chemical change like, change in pH, denaturation of protein takes place. Explain the cause. |
12 |
| 730 | 40. Ketones do not reduce Fehling’s solution and Tollens reagent, but fructose with a keto group reduces it. This is due to (1) CH – OH group which is oxidised to keto group. (2) Enolisation of keto group of fructose and then its interconversion to aldehyde group in the presence of OH of the reagent. (3) Lobry de Bruyn Van Ekenstein rearrangement. (4) Epimerisation and Ruff’s degradation (a) 1, 2 (b) 3,4 (c) 1,2,3 (d) 2,3 (BHU) |
11 |
| 731 | Which of following has a clover leaf shaped structure? ( mathbf{A} cdot ) tRNA B. rRNA c. DNA D. mRNA |
11 |
| 732 | Among the following organic acids, the acid present in rancid butter is: A . pyruvic acid B. lactic acid c. butyric acid D. acetic acid |
12 |
| 733 | Glucose reacts with ( C H_{3} O H, ) in presence of dry ( boldsymbol{H} boldsymbol{C l} ) gas, to form: A . ( alpha ) -methyl glucoside B. ( beta ) -methyl glucoside c. both A and B D. none of these |
12 |
| 734 | Match the sugars in column I with their types given in column II and mark the appropriate choice. Column I (A) Glucose (i) Ketohexose (B) Fructose (ii) Aldohexose (C) Ribose (iii) Aldotetrose (D) Erythrose (iv) Aldopentose ( A cdot(A) rightarrow(i v),(B) rightarrow(i),(C) rightarrow(i i i),(D) rightarrow(text { ii }) ) B. (A) ( rightarrow ) (iii), (B) ( rightarrow ) (iv), (C) ( rightarrow ) (i), (D) ( rightarrow ) (ii) C ( cdot(A) rightarrow(i),(B) rightarrow(text { ii) },(C) rightarrow(text { iii) },(D) rightarrowtext { (ii) } ) D. (A) ( rightarrow ) (ii), (B) ( rightarrow ) (i), (C) ( rightarrow ) (iv), (D) ( rightarrow ) (iii) |
12 |
| 735 | What is peptide linkage? How is dipeptide formed? | 12 |
| 736 | 49. Which one of the following does not exhibit the phenomenon of mutarotation? (a) (+) Sucrose (b) (+) Lactose C) (+) Maltose (d) Fructose (AIPMT) |
11 |
| 737 | 69. Among the following the achiral amino acid is (a) 2-ethylalanine (b) 2-methylglycine (c) 2-hydroxymethylserine (d) tryptophan. (ANIN |
11 |
| 738 | Question 13. How do enzymes help a substrate to be attacked by the reagent effectively? solusi O citos are nresent Thon |
12 |
| 739 | Write the name of deficiency diseases of Vitamin A, Vitamin ( B_{1}, ) Vitamin C and Vitamin D. |
12 |
| 740 | What forms the backbone of a polynucleotide strand of a nucleic acid? |
11 |
| 741 | Which of the following hormones contains iodine? A. Insulin B. Thyroxine c. Adrenaline D. Testosterone |
12 |
| 742 | Glycosidic linkage is an: A. amide linkage B. ester linkage c. ether linkage D. acetyl linkage |
12 |
| 743 | Free aldehyde group can be produced on hydrolysis of which of the following compound(s)? This question has multiple correct options A. Maltose B. Sucrose c. ( alpha ) -D Glucose D. Lactose |
12 |
| 744 | Define the following terms with a suitable example: Polysaccharides |
12 |
| 745 | 90. Isoelectric point of glycine is (a) 8.6 (b) 7 (c) 12.4 (d) 6.2 |
11 |
| 746 | The adrenal glands consist of : A. lower adrenal and upper paradrenal sections B. ACTH and BCTH sections C. the inner and outer layer of the kidney D. the inner medulla and the outer cortex |
12 |
| 747 | Insulin production and its action in human body are responsible for the level of diabetes. This compound belongs to which of the following categories: A. A coezyme B. A hormone c. An enzyme D. An antibiotic |
12 |
| 748 | Which of the following refers to particularly stable arrangements of amino acid residues in a protein that give rise to recurring patterns? A. Primary structure B. Secondary structure c. Tertiary structure D. Quaternary structure |
12 |
| 749 | Relation between amino acids and proteins is similar to the one between: A. nucleotides and nucleic acids B. RNA and DNA c. Glucose and fructose D. Glucose and Mannose |
12 |
| 750 | Question 9. Some enzymes are named after the reaction, where they are used. What name is given to the class of enzymes which catalyse the oxidation of one substrate with simultaneous reduction of another substrate? |
12 |
| 751 | Molecular weight of cellulose is: A. ( 50000-500000 ) B. 2000 – 10000 ( c .5000-45000 ) D. 5000 – 25000 |
12 |
| 752 | Explain the process of formation of complex proteins. | 12 |
| 753 | Who coined the term zymase for enzymes in yeast? A. Kuhne B. Sumner c. Louis Pasteur D. Eduard Buchner |
11 |
| 754 | Zwitter ion contains: A. -ve charge B. +ve charge C. both +ve and -ve charge D. none of the above |
12 |
| 755 | The glycosidic linkage involved in linking the glucose units in amylose part of starch is: A ( cdot C_{1}-C_{4} beta- ) linkage в. ( C_{1}-C_{6} alpha- ) linkage c. ( C_{1}-C_{6} beta- ) linkage D. ( C_{1}-C_{4} alpha- ) linkage |
12 |
| 756 | Which gives only glucose by hydrolysis? A. Sucrose B. Raffinose c. Maltose D. Galactose |
12 |
| 757 | Match the following. begin{tabular}{llll} (a) & Protein & (i) & SER \ (b) & Lipid & (ii) & Golgi body \ (c) & Glycoprotein & (iii) & Lysosome \ (d) & Hydrolytic enzyme & (iv) & RER \ hline end{tabular} ( A cdot a-i, b-i i, c-i i i, d-i v ) B. a-iv, b-ii, c-i, d-iii c. a-iv, b-i, c-ii, d-iii D. a-i, b-iii, c-ii, d-iv |
11 |
| 758 | Which of the following statement about condensation is not true? A. Protein synthesis result from them. B. Polysaccharide synthesis result from them. C. Nucleic acid synthesis result from them. D. They consume water as a reactant. E. Different condensation reactions produce different kinds of macromolecules. |
11 |
| 759 | Zwitter ion can be formed by: A . acetanilide B. benzanilide c. sulphanilic acid D. benzene sulphonamide |
12 |
| 760 | Which of the following is called energy currency of the cell? A . ATP в. мАDР ( H_{2} ) ( mathbf{c} cdot C_{6} H_{12} O_{6} ) D. ( C_{2} H_{5} ) ОН |
11 |
| 761 | A carbohydrate ( X ) having molecular weight ( 180 g m o l^{-1} ) has one primary alcohol group and four secondary alcoholic groups. It reacts with acetic anhydride to form pentaacetate. The molecular weight of pentaacetate formed is: A. 180 в. 210 ( c .390 ) D. 42 |
12 |
| 762 | Which of the following is/are pyrimidine derivatives? 1.Cytosine 2. Adenine 3. Uracil 4. Thymine A. 1 and 4 only B. 2 and 3 only c. 1 and 3 only D. 1, 3 and 4 only |
12 |
| 763 | 19. Which of the following carbohydrates rotates the plane polarized light to the left? (a) (+) – Sucrose (b) (+) – Maltose (c) (+) – Lactose (d) (-) – Fructose – Sucrose 3) – Maltose AO |
11 |
| 764 | Question 4. The melting points and solubility in water of amino acids are generally higher than that of the corresponding halo acids. Explain. Higher the polarity of a group, more is its solubility in water. |
12 |
| 765 | The hormones used by athletes to increase the mass and strength of muscles is/are A. estrogens B. gestogens c. androgens and testosterone D. both estrogens and androgens |
12 |
| 766 | Which of the following is a unit of nucleic acid? A. Phosphoric acid B. Nitrogenous bases c. Pentose Sugar D. Nucleotides |
11 |
| 767 | Which of the following is a source of instant energy? A. Salt B. Glucose c. water D. starch |
12 |
| 768 | Anti hemorrhagic vitamin is: ( A cdot A ) B. B ( _{1} ) ( c cdot k ) D. |
12 |
| 769 | Which of the following does not represent a disaccharide? A. Maltose B. Sucrose c. Lactose D. Dextrose |
12 |
| 770 | Which of the following enzymes is present in animals like cows, buffaloes, etc to digest compound like paper cloth, etc.? A . Uraze B. Cellulase c. silicones D. sucrase |
11 |
| 771 | Aspartame, an artificial sweetener is a peptide and has the following structure. Which of the following is correct about the molecule? This question has multiple correct options A. It has four functional groups B. It has three functional groups C. On hydrolysis it produces only one amino acid D. on hydrolysis it produces a mixture of amino acids |
12 |
| 772 | .38 Amino acids can be classified as a-, B-, Y-, 8- and so on depending upon the relative position of amino group with respect to carboxyl group. Which type of amino acids form polypeptide chain in proteins? OT |
12 |
| 773 | Assertion(A): Purine bases present in DNA are adenine and guanine. Reason(R): The base uracil is present in DNA whereas the base thymine is present in RNA. A. Both A and R are true and R is the correct explanation of A B. Both A and R are true but R is not a correct explanation of A c. A is true but R is false D. .A is false but R is true |
12 |
| 774 | Which of the following acts as a biological catalyst? A. Lipids B. Proteins c. carbohydrages D. Nucleic acids |
12 |
| 775 | Q. 14 Which of the following bases is not present in DNA? (a) Adenine (b) Thymine (c) Cytosine (d) Uracil |
11 |
| 776 | Find the hydrolysis product of maltose: A . ( alpha-D- ) glucose ( +alpha-D- ) glucose B. ( alpha-D- ) glucose ( +alpha-D- ) fructose c. ( alpha-D-g l u c o s e+alpha-D-g a l a c t o s e ) D. ( alpha-D- ) fructose ( +alpha-D- ) galactose |
12 |
| 777 | Which one of the following sets of vitamins is fat soluble? A ( . C, D, B_{6}, B_{12} ) в. ( A, D, E, K ) c. ( A, D, B_{1}, B_{2} ) D. ( D, B_{1}, B_{2}, E ) |
12 |
| 778 | What is the angle of rotation when ( 5 M alpha-D ) mannopyranose is taken in of length 200mm? A ( .52 .2^{circ} ) B . 29 ( c cdot 26.1^{circ} ) D. 14.5 |
12 |
| 779 | Compound ( (D) ) is: ( (mathbf{D})left(mathbf{C}_{4} mathbf{H}_{9} mathbf{N} mathbf{O}_{2} mathbf{C l}_{2}right) ) ( A ) B. ( c ) D. none of the above |
12 |
| 780 | The type of bond that is most important in maintaining secondary structure of a protein is A. disulphide bridges B. hydrogen bonding within the backbones c. hydrogen bonding between ( R ) group D. salt bridges |
12 |
| 781 | 3. Which one given below is a non-reducing sugar? (a) Glucose (b) Sucrose (c) Maltose (d) Lactose |
11 |
| 782 | Given are the structures of cyclic ( D ) glucoside Moles of ( H C H O ) formed are: ( (X) ) A . 1,1 в. 2,2 ( mathrm{c} cdot 1,2 ) D. 2, |
12 |
| 783 | Nongenetic RNA is of A. Two types B. Three types C. Four types D. One type |
12 |
| 784 | Hydrolysis of d-sucrose result in change of optical rotation because A. number of moles of d-Glucose are less than number of moles of I-Fructose produced during hydrolysis. B. Angle of rotation of I-Fructose is greater than AOR of dGlucose C. Both glucose and fructose are levorotatory. D. Glucose is I and fructose is d and number of moles of glucose formed during reaction are greater than number of moles of fructose. |
12 |
| 785 | The correct statement about the following disaccharide is: This question has multiple correct options |
12 |
| 786 | A compound with molecular mass 180 is acylated. with [image] to get a compound with molecular mass 390 The no. of amino group present per molecule of the former compound is: ( A cdot 2 ) B. 5 ( c cdot 4 ) ( D ) |
12 |
| 787 | Name the enzyme which possibly acts as an ion carrier. | 11 |
| 788 | The number of amino acids found in proteins that a human body can synthesise is? A . 20 B. 25 ( c cdot 11 ) D. 100 |
12 |
| 789 | What is meant by peptide linkage and biocatalysts? | 12 |
| 790 | What is glycogenolysis? | 12 |
| 791 | Which one of the following has phosphoric acid anhydride bonds? A. Deoxy ribonucleic acid B. Ribonucleic acid c. dNTPs D. Phospholipids |
11 |
| 792 | Give two example of water-soluble vitamins. | 12 |
| 793 | Artificial sweetener which is 600 times sweeter than sucrose is: A. aspartame B. alitame c. sucralose D. saccharin |
12 |
| 794 | Mark the incorrect statement. A. The building blocks of lipids are amino acids. B. Majority of enzymes contain a non-protein part called the prosthetic group. C. The thylakoids are arranged one above the other like a stack of coins forming a granum. D. Crossing-over occurs at pachytene stage of meiosis I. E. Steroids are complex compounds commonly found in cell membranes and animal hormones. |
11 |
| 795 | Write the general formula of zwitter ionic form of an amino acid. | 12 |
| 796 | In the sequence of changes/processes in the following,identify XYZ. replication ( (X)-> ) transciption ( (Y) rightarrow ) (Z)translation A. DNA, DNA and RNA B. RNA, RNA and DNA D. DNA, RNA and DNA |
12 |
| 797 | Estradiol is responsible for the development of A. Primary male characters B. Secondary female characters c. Primary female characters D. Secondary male characters |
12 |
| 798 | Carbohydrates that, on attempted hydrolysis, are not cleaved to smaller carbohydrates are called: A. oligosaccharides B. polysaccharides c. disaccharides D. monosaccharides |
12 |
| 799 | Consider the statements about mono, di and oligo saccharides: I. These are crystalline solids. II. These are soluble in cold water. III. These are tasteless. The incorrect statement(s) is/are: A. only II B. I, II and III c. I and II only D. I and III only |
12 |
| 800 | One of the following represents feed back inhibition A. Reaction of snake venom with neuro – transmitter B. Malate inhibiting succinic dehydrogenase C . Cyanides inhibiting cytochrome a D. Allosteric compound ATP inhibiting hexokinase enzyme |
11 |
| 801 | Consider the statements about cellulose. The correct statements is/are: |
12 |
| 802 | Which of the following is not a fat soluble vitamin? ( A cdot ) Vitamin A B. Vitamin B complex c. Vitamin D D. Vitamin E |
12 |
| 803 | J & R CET) 108. Denaturation of protein (a) disrupts the primary or secondary or tertiary structure of protein (b) disrupts the secondary and tertiary structures only (c) disrupts all the primary, secondary and tertiary and even the quaternary structure of protein (d) will not affect the original biological activity (e) is always irreversible. (Kerala PMT) MAT |
11 |
| 804 | The difference between amylose and amylopectin is A. Amlyopetin have ( 1 rightarrow 4 alpha ) -linkage and ( 1 rightarrow 6 beta ) – linkage B. Amlyopetin have ( 1 rightarrow 4 alpha ) -linkage and ( 1 rightarrow 6 alpha ) – linkage C. Amylose is made up of glucose and galactose D. Amylose have ( 1 rightarrow 4 alpha ) -linkage and ( 1 rightarrow 6 beta ) – linkage |
12 |
| 805 | The central dogma of molecular genetics states that genetic information flows from : A. DNA ( rightarrow ) RNA ( rightarrow ) Proteins B. DNA ( rightarrow ) RNA ( rightarrow ) Carbohydrates c. Amino acids ( rightarrow ) Proteins ( rightarrow ) DNA D. DNA ( rightarrow ) Carbohydrates ( rightarrow ) Proteins |
12 |
| 806 | The sugar moiety present in ( boldsymbol{R} boldsymbol{N} boldsymbol{A} ) molecule is: A. ( beta-D-2 ) – deoxyribose B. ( beta-D- ) galactose c. ( beta-D ) – fructofuranose D. ( beta-D- ) ribose E. ( beta-D-3- ) ribose |
12 |
| 807 | Heparin is a homopolysaccharide. Say True or False: A. True B. False |
12 |
| 808 | Q. 5 Proteins are found to have two different types of secondary structures viz a-helix and B-pleated sheet structure. a-helix structure of protein is stabilised by (a) peptide bonds (b) van der Waals, forces (c) hydrogen bonds (d) dipole-dipole interactions Ans.(c) Secondan structures of protein donoton the chap in which a long polipeptide chain |
11 |
| 809 | The catalytic efficiency of two different enzyme can be compared by the A. The K ( _{m} ) value B. The pH optimum value C. Formation of the product D. Molecular size of the enzyme |
11 |
| 810 | Name the nitrogenous base present in sphingolipids. | 12 |
| 811 | 21. Which of the following is a non-reducing sugar? (a) Sucrose (b) Maltose (c) Lactose (d) Mannose (All |
11 |
| 812 | An organic compound has a triple bond and double bond. It can be tested by : A. Bromine water B. Beyer’s reagents c. Fehling’s solution D. Ammonical ( A g N O_{3} ) |
11 |
| 813 | Elucidate the structure of fructose. | 12 |
| 814 | Energy required to break one bond in DNA is approximately: ( mathbf{A} cdot sim 1 mathrm{eV} ) в. 0.1 ev c. ( sim 0.01 ) ev D. ( sim 2.1 mathrm{eV} ) |
12 |
| 815 | Question 2. What are the expected products of hydrolysis of lactoser Lactose is a disaccharide of glucose and galactose. On hydrolysis, it will produce monosaccharides. |
12 |
| 816 | Q. 64 Assertion (A) Deoxyribose, C.H.00, is not a carbohydrate. Reason (R) Carbohydrates are hydrates of carbon so compounds which follow C, (H2O), formula are carbohydrates. at Doribon |
12 |
| 817 | Column Column II (Compouds) ( quad ) (Characteristic property) | 12 |
| 818 | Explain the importance of carbohydrates | 12 |
| 819 | If a man is exposed to an environment of ( 100 % ) oxygen, then the concentration of which of the following enzyme is increased in lungs? A. Superoxide dismutase B. Catalase c. carbonic anhydrase D. All of the above |
11 |
| 820 | The following tripeptide can be represented as. ( mathbf{A} cdot operatorname{Tyr}-V a l-T h r ) B. Phe ( -A l a- )Ser c. ( P h e- )Leu( – )Cys D. ( L y s-A l a-S e r ) |
12 |
| 821 | During the replication of DNA, one of the two strands is synthesized in pieces and are joined later in the presence of enzyme called A. RNA ligase B. DNA ligase c. r- RNA D. ( m ) – RNA |
12 |
| 822 | sucrose on 2.3 Sucrose (cane sugar) is a disaccharide. One molecule of sucio hydrolysis gives ……… (a) 2 molecules of glucose (b) 2 molecules of glucose + 1 molecule of fructose (c) 1 molecule of glucose + 1 molecule of fructose (d) 2 molecules of fructose |
12 |
| 823 | 2.17 Optical rotations of some compounds alongwith their structures are given below which of them have D configuration. CHO Снон . .. н -он с=0 сно но – он он -н н — он нонен он н – он н — ОН CHрон CH2OH CH2OH (+) rotation (+) rotation – rotation (а) I, II, II (b) II, III (c) I, II (d) III |
12 |
| 824 | Raffinose is: A. trisaccharide B. disaccharide C. monosaccharide D. polysaccharide |
12 |
| 825 | Assertion Millon’s test is a test for identification of proteins. Reason Millon’s reagent is a solution of mercurous nitrate and mercuric nitrate in nitric acid containing little nitrous acid. A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion c. Assertion is correct but Reason is incorrect D. Both Assertion and Reason are incorrect |
12 |
| 826 | Histones are present in A. Cell membrane B. Lysosomes c. Nucleosomes D. Sphaerosomes |
11 |
| 827 | Nucleic acids are polymer of A. Nucleotides B. Nucleosides C. Amino acids D. Nitrogen bases |
11 |
| 828 | Question 7. What are the hydrolysis products of (i) sucrose and (ii) lactose? (0) Sucrose is a disaccharide of glucose and fructose and lactose is a disaccharide of glucose and galactose. (ii) Disaccharides on hydrolysis give monosaccharides. |
12 |
| 829 | Baking powder is more commonly used to make cakes or bread “rise”. Filler in baking powder is: A. ( operatorname{NaH} mathrm{CO}_{3} ) в. ( operatorname{Ca}left(text { На }_{2} text { РО }_{4} ) ) right. c. starch D. ( operatorname{NaAl}left(S O_{4}right)_{2} ) |
12 |
| 830 | Which one of the following is not present in RNA? A . Uracil B. Thymine c. Guanine D. Adenine |
12 |
| 831 | A glycoside is the carbohydrate form of an: A. Ether B. Acetal c. Aglycone D. Alcohol |
12 |
| 832 | Which of the following statement is incorrect? A. Average temperature decreases progressively form plains to the mountain tops B. Average temperature decreases progressively form the equator towards the poles c. Temperature affects the kinetic of enzymes and through it the basal metabolism of organism D. None of these |
11 |
| 833 | Q. 46 Amino acids behave like salts rather than simple amines or carboxk acids. Explain. |
11 |
| 834 | All vitamins are synthesised by: A . plants B. human beings c. fishes D. all |
12 |
| 835 | ( D- ) mannose ( stackrel{H O^{-}}{rightleftharpoons} D-g l u c o s e stackrel{H O}{rightleftharpoons} ) A Product ( (A) ) of above reaction is: A . ( D- ) fructose B. ( D- )talose ( mathbf{C} cdot D-i d o s e ) D. ( D- ) glucose |
12 |
| 836 | Which statements are correct about sucrose? This question has multiple correct options A. IUPAC name of sucrose is ( alpha ) -D-glucopyranosyl- ( beta ) -Dfructofuranside B. IUPAC name of sucrose is ( beta ) -D-fructofuranosyl- ( alpha ) -Dglucopyranoside C. It is hydrolysed both by emulsin and amylase D. On hydrolysis, the solution is laevorotatory |
12 |
| 837 | a) Write Haworth structure of “Lactose” b) i) What are non-essential amino acids? ii) Write Zwitter ionic structure of “glycine”. c) Name the nitrogenous base present in RNA but not in DNA. |
12 |
| 838 | Hydrolysis of sucrose is called A. mutarotation B. saponification c. inversion D. de-esterification |
12 |
| 839 | What is the generic name of riboflavin? A. Vitamin ( B_{1} ) B. Vitamin ( B_{2} ) c. Vitamin ( B_{6} ) D. Vitamin ( B_{3} ) |
12 |
| 840 | Which one is common among nucleus, chloroplast and mitochondria? A. Cristae B. Nucleic acids c. Thylakoids D. Carbohydrate metabolism |
11 |
| 841 | Starch is composed of amylose and A. amylopectin B. maltose c. glycogen D. none of the above |
12 |
| 842 | For ‘invert sugar’, the correct statement(s) is(are). (Given: specific rotations of ( (+) ) sucrose, ( (+) ) -maltose, ( L-(-) ) -glucose and ( L-(+) ) -fructose in aqueous solution ( operatorname{are}+66^{circ},+140^{circ},-52^{circ} ) and ( +92^{circ} ) respectively) This question has multiple correct options A. ‘Invert sugar’ is prepared by acid catalyzed hydrolysis of maltose B. ‘Invert sugar’ is an equimolar mixture of D-(+)-glucose and ( D-(-) ) -fructose C. specific rotation of ‘invert sugar’ is ( -20^{circ} ) D. On reaction with ( B r_{2} ) water, ‘invert sugar’forms saccharic acid as one of the products |
12 |
| 843 | Define the following terms as related to proteins. (i) Peptide linkage (ii) Primary structure (iii) Denaturation |
12 |
| 844 | Who discovered the coenzymes? A. James Sumner B. Fritz Lipmann c. Mayerhoff D. Eduard Buchner |
11 |
| 845 | The essential chemical components of many coenzymes are A. Proteins. B. Nucleic acid c. carbohydrates. D. Vitamins. |
11 |
| 846 | Total amino acids in insulin (bovine) are 51 in polypeptide chains ( A ) and ( B ) How many amino acids are there in chain A? A .21 B. 20 ( c . ) 30 D. 31 |
11 |
| 847 | Write a short note on Cellulose. | 12 |
| 848 | The structure of a protein can be denatured by heat. A. True B. False |
12 |
| 849 | Q. 31 In nucleoside, a base is attached at 1′ position of sugar moiety. Nucleotide is formed by linking of phosphoric acid unit to the sugar unit of nucleoside. At which position of sugar unit is the phosphoric acid linked in a nucleoside to give a nucleotide? |
12 |
| 850 | The building block of proteins are: A. ( alpha ) -hydroxy acid B. ( alpha ) -amino acid c. ( beta ) – hydroxy acid D. ( beta ) – amino acid |
12 |
| 851 | Hormone that maintains the blood glucose level within the limit is: A. thyroxine B. insulin c. testosterone D. epinephrine |
12 |
| 852 | Bonding between deoxyribose and base in pyrimidine nucleoside molecule is :- A ( cdot 1^{prime}-1^{prime} ) glycosidic linkage B . ( 1^{prime}-6^{prime} ) glycosidic linkage C ( cdot 1^{prime}-9^{prime} ) glycosidic linkage D. ( 1^{prime}-4^{prime} ) glycosidic linkage |
11 |
| 853 | Which one of the following is a disaccharide? A. Starch B. Lactose c. Cellulose D. Fructose |
12 |
| 854 | The reason for double helical structure of DNA is the operation of: A. electrostatic attractions B. van der Waals forces c. dipole – dipole interactions D. hydrogen bonding |
12 |
| 855 | Sugar and amino acids are A. Primary metabolites B. Secondary metabolites c. Feed stock D. Inoculum |
11 |
| 856 | | 72. Assertion : Solubility of proteins is minimum at the isoelectric point. Reason : At isoelectric point, protein molecule behaves as a zwitter ion. (a) If both assertion and reason are true and reason is the correct explanation of assertion. (b) If both assertion and reason are true but reason is not the correct explanation of assertion. (c) If assertion is true but reason is false. (d) If both assertion and reason are false. (AIIMS) |
11 |
| 857 | Which of the following statements is/are incorrect? A. A nucleic acid is a molecule made up of a nitrogenous base, a phosphate group and a 5-carbon sugar B. A nucleic acid is a molecule made up of a nitrogenous base, a phosphate group and a ribose sugar C. A nucleic acid is a molecule made up of a nitrogenous base, a phosphate group and a deoxyribose sugar D. None of the above |
11 |
| 858 | Which one is not an example for hydrolases? A. Dehydrogenase B. Protease c. Amylase D. Esterase E. Sucrase |
11 |
| 859 | Which of the following is not a coenzyme? A. NAD B. NADP c. FAD D. ATP |
11 |
| 860 | Q. 56 How will you distinguish 1º and 2° hydroxyl groups present in glucose: Explain with reactions. |
11 |
| 861 | Starch is: ( mathbf{A} cdot C_{12} H_{22} O_{11} ) B. ( C_{6} H_{10} O_{5} ) ( mathbf{c} cdotleft(C_{6} H_{10} O_{5}right)_{n} ) ( mathbf{D} cdotleft(C_{6} H_{12} O_{6}right)_{n} ) |
12 |
| 862 | Formula of glucose is : A. ( C_{5} H_{12} O_{6} ) в. ( C_{6} H_{12} O_{16} ) ( mathbf{c} cdot C_{6} H_{12} O_{7} ) D. ( C_{6} H_{12} O_{6} ) |
12 |
| 863 | Amino acids are :- A. As basic as a typical amine and as acidic as a carboxylic acid. B. Less basic than a typical amine and less acidic than a -СООН C. More basic than atypical amine and more acidic than ( a-c O O H ) D. Nothing is certain |
12 |
| 864 | Chitin is composed of A. Protein and carbohydrates B. Carbohydrates and mannose C. Fatty acids and carbohydrates D. Polysaccharides rich mannose |
11 |
| 865 | Which of the following is not optically active? A. Glycine B. Lysine c. Aspartic acid D. Isoleucine |
12 |
| 866 | 104. Sanger’s reagent is used for the identification of (a) C-terminal amino acid of peptide chain (b) N-terminal amino acid of peptide chain (c) Molecular mass of protein (d) Secondary structure of protein. (OJ |
11 |
| 867 | In structure ATP is similar to A. DNA (deoxyribonucleotide) B. RNA(ribonucleotide) C. Ribonucleoside D. Deoxyribonucleoside |
11 |
| 868 | Assimilatory power refers to the A. Generation of ATP and NADPH ( _{2} ) B. Reduction of ( mathrm{CO}_{2} ) C . Splitting of water D. Disintegration of plastids |
11 |
| 869 | A sample of protein was analysed for me metal content and analysed for metal cotent and analysis revealed that it contained magnesium and titanium in equal amount by mass. If these are the only metallic species present in the protein and contains ( 0.016 % ) metal, the minimum possible molar mass of the protein is ( [M g=24, T i=48] ) A .6,00,000 В. 1,50,000 c. 3,00,000 D. 12,00,000 |
12 |
| 870 | Which of following hormone is produced by testis? A. Progesterone B. Estradiol c. Testosterone D. estrone |
12 |
| 871 | 0.49 Activation energy for the acid catalysed hydrolysis of sucrose is 6.22 kJ mol-, while the activation energy is only 2.15 kJ mol when hydrolysis is catalysed by the enzyme sucrase. Explain. |
11 |
| 872 | Which of the following elements is needed as a component in cell membranes, nucleic acids and energy transfer? A. Sulphur B. Phosphorus c. Calcium D. Potassium |
11 |
| 873 | 0.34 Monosaccharides contain carbonyl gr osaccharides contain carbonyl group hence are classified, as aldose or ketose. The number of carbon atoms present in the monosaccharide molecule are also considered for classification. In which class of monosaccharide will you place fructose? |
11 |
| 874 | What are carbohydrates? Classify them and also write their characteristics. | 12 |
| 875 | Define the following terms: (i) Glycosidic linkage (ii) Invert sugar (iii) Oligo saccharides |
12 |
| 876 | Nucleotides are made up of A. Glycerols, fatty acids, and phosphates B. Sugars, phosphates, and nitrogenous bases C. Amino groups, hydrogens, and carboxyl groups D. Protons, neutrons, and electrons E. Protons and neutrons only |
11 |
| 877 | The human blood is a complex mixture of biochemicals. It contains many proteins. These can be separated by moving them in a solution under the influence of: A. intense radiaton B. an electric field c. a magnetic force D. an organic solvent |
12 |
| 878 | 1 Q. 2 Which of the following polymer is stored in the liver of animals? (a) Amylose (b) Cellulose (c) Amylopectin (d) Glycogen |
11 |
| 879 | Blocking of active site of an enzyme is a kind of A. Non-competitive inhibition B. Competitive inhibition c. Allosteric inhibition D. Feed back inhibition |
11 |
| 880 | Vitamin B ( _{1} ) is known as: A. ascorbic acid B. carotenoids c. thiamine D. pyridoxine |
12 |
| 881 | ( D- ) Glucose and ( D- ) fructose both form the same osazone. Which statements are correct about the above reaction? This question has multiple correct options A. Glucose and fructose are epimers B. Glucose and fructose are anomers c. The configurations of the ( O H ) group at ( C-3 ) and ( C ) – 4 in glucose and fructose are same D. The configurations of the ( O H ) group at ( C-4 ) and ( C ) 5 in glucose and fructose are same |
12 |
| 882 | Prepare Dipeptide from Alanine. | 12 |
| 883 | Q. 11 Each polypeptide in a protein has amino acids linked with each other in a specific sequence. This sequence of amino acids is said to be …***.. (a) primary structure of proteins (b) secondary structure of proteins (C) tertiary structure of proteins (d) quateranary structure of proteins |
12 |
| 884 | Amino acids are classified as acidic, basic or neutral depending upon the relative number of amino and carboxyl groups in their molecule. Which of the following are acidic? (i) ( left(boldsymbol{C H}_{3}right)_{2} boldsymbol{C H}-boldsymbol{C}_{boldsymbol{I} boldsymbol{H}_{2}} boldsymbol{H}-boldsymbol{C O O H} ) (ii) ( H O O C-C H_{2}-C H_{2}-C_{I H_{2}} H ) COOH (iii) ( boldsymbol{N} boldsymbol{H}_{2}-boldsymbol{C} boldsymbol{H}_{2}-boldsymbol{C} boldsymbol{H}_{2}-boldsymbol{C} boldsymbol{H}_{2}- ) COOH (iv) ( H O O C-C H_{2}-C_{mid} H-C O O H ) ( A cdot ) (ii) and (iv) B. (iii) and (iv) c. (i) and (ii) D. (ii) and (iii) |
12 |
| 885 | Keratin, a structural protein is present in : A. hair B. skin c. wool D. all |
12 |
| 886 | Define the following as related to proteins: (i) Peptide linkage (ii) Primary structure (iii) Denaturation |
12 |
| 887 | What will be the product of the reaction? |
12 |
| 888 | Starch is a mixture of two components, a water soluble component amylose(15( 20 % ) and a water insoluble component amylopectin (80-85%). The aqueous solution of amylose gives a blue colour with iodine solution due to the formation of: A. amylose iodide B. amylose iodate c. inclusion complex D. amylose tetraiodide complex |
12 |
| 889 | Starch is composed of two polysaccharides which are: A. amylopectin and glycogen. B. amylose and glycogen. c. amylose and amylopectin. D. cellulose and glycogen. |
12 |
| 890 | Enzymes which catalyse reactions involving changes in structure of a molecule are A . Ligases B. Isomerases c. Hydrolases D. Transferases |
11 |
| 891 | Write the properties of hormone. | 12 |
| 892 | RNA contains which of the following base, in place of thymine of DNA. A. Cytosine B. Uracil c. Adenine D. None of the above |
11 |
| 893 | 0.69 Carbohydrates are essential for life in both plants and animals. Name the carbohydrates that are used as storage molecules in plants and animals, also name the carbohydrate which is present in wood or in the fibre of cotton cloth. |
11 |
| 894 | Which may be attached with adenine base in RNA? A. Guanine B. Cytosine c. Uracil D. Thymine |
11 |
| 895 | 0.71 Write the structures of fragments produced on complete hydrolysis of DNA. How are they linked in DNA molecule? Draw a diagram to show pairing of nucleotide bases in double helix of DNA. |
11 |
| 896 | The source of pyridoxine is: A. cereals B. meat c. yeast D. all of the above |
12 |
| 897 | . 48 Protein found in a biological system with a unique three-dimensional structure and biological activity is called a native protein. When a protein in its native form, is subjected to a physical change like change in temperature or a chemical change like, change in pH, denaturation of protein takes place. Explain the cause. Ans. Due to novcionland |
11 |
| 898 | Among the naturally occurring carbohydrates, furanose ring is found in the: A. glucose unit of cane sugar B. glucose unit of cellulose c. fructose unit of cane sugar D. galactose unit of lactose |
12 |
| 899 | A polysaccharide is a polymer of A. monosaccharides B. disaccharides c. both A and B D. None of these |
12 |
| 900 | ( boldsymbol{alpha}- ) Helix structure of polypeptide contains: A. intermolecular hydrogen bonds B. intramolecular hydrogen bonds ( c . ) both ( A ) and ( B ) D. none of these |
12 |
| 901 | Q. 9 Nucleic acids are the polymers of (a) nucleosides (b) nucleotides (c) bases (d) sugars |
12 |
| 902 | Keratin, a structural protein is present in? A. hair B. wool c. silk D. all of these |
12 |
| 903 | The amino acid ( boldsymbol{H}_{2} boldsymbol{N} boldsymbol{C H}(boldsymbol{C O O H})left(boldsymbol{C H}_{2}right)_{4} boldsymbol{N} boldsymbol{H}_{2} ) at low ( p H ) exits as: A ( cdot H_{2} N C H(C O O H)left(C H_{2}right)_{4} N H_{2} ) в. ( H_{3} stackrel{+}{N} C H(C O O H)left(C H_{2}right)_{4} N H_{2} ) c. ( H_{3} stackrel{+}{N} C H(C O O H)left(C H_{2}right)_{4} stackrel{+}{N} H_{3} ) D. ( H_{2} N C H(C O O H)left(C H_{2}right)_{4} stackrel{+}{N} H_{3} ) |
12 |
| 904 | The basic monosaccharide units of lactose are glucose and galactose. A. True B. False |
12 |
| 905 | 1) What are vitamins? Name any two diseases caused by deficiency of vitamin A. Write the structure of (a) nucleoside (b) nucleotide 2) How are 1 -nitropropane, 2 nitropropane and 2-methyl-2nitropropane are distinguished from each other using nitrous acid? |
12 |
| 906 | Assertion Low temperature destroys enzymes by causing their denaturation. Reason High temperature preserves the enzymes in their inactive stage. A. Both statements 1 and 2 are correct B. Statement 1 is correct but statement 2 is incorrect c. statement 1 is incorrect but statement 2 is correct D. Both statements1 and 2 are incorrect. |
11 |
| 907 | 31. Glucose on oxidation with bromine water gives (a) gluconic acid (b) tartaric acid (c) saccharic acid (d) mesoxalic acid (e) tartronic acid. (Kerala P/ |
11 |
| 908 | A ( 68 n m ) length double stranded DNA has 24 adenine nucleotices. What must be the number of guanine nucleotides? ( mathbf{A} cdot 48 ) B. 72 c. 76 D. 176 |
11 |
| 909 | Bases common to RNA and DNA are? A. adenine, guanine, cytosine B. adenine, uracil, cytosine c. adenine, guanine, thymine D. guanine, uracil, thymine |
12 |
| 910 | Cellular micromolecules are A. Amino acids, Water, Minerals and Sugars B. Glycogen, Amino acids, Minerals and Nucleotides C. Water, Minerals, Nucleic acids, Amino acids and Nucleotides D. Sugars, Water, Minerals, Proteins and Nucleotides |
11 |
| 911 | The ( % ) of ( alpha- ) anomer in the mixture is: A . 32.6 B. 67.4 c. 42.6 D. 57.4 |
12 |
| 912 | Alanine forms Zwitter ion which exists as A. ( C H_{3}-quad C quad H C O O^{-} ) in a medium of ( p H=12 ) ( C H_{3}-C_{uparrow} H C O O ) ( +N H_{3} ) B. ( C H_{3}-underset{t_{1}}{C} H C O O H ) in a medium of ( p H=4 ) c. ( C H_{3}-C H-C O O^{-} ) in a medium of ( p H=7 ) ( C H_{3}-C H-C O O ) ( _{N H_{2}} ) D. None of these |
12 |
| 913 | 86. An acidic amino acid among the following is (a) glycine (b) valine (c) proline (d) leucine (e) alanine. (Kerala PMT) |
11 |
| 914 | One way of defining or identifying carbohydrates is to say that they can be described by the general formula, ( C_{m}left(H_{2} Oright)_{n}, ) where ( m ) and ( n ) may or may not be the same integer. Of the four structures displayed in the figure above, which one does NOT fit this definition of a carbohydrate? The four figures, I-IV, below, are all composed of carbon(C) [ O=C quad text { oxygen }(O), text { and hydrogen }(mathbf{H}) ] ( 0=0 quad ) as indicated by the legendat left ( circ=mathbf{H} quad ) You will be asked to use these figures to answer a series of questions. 0 ( mathbf{I} ) ( A ) в. ॥ ( c ) D. IV |
12 |
| 915 | Cellophane is used as a plastic wrapper It is made from: A. gummmmmmm B. chitin c. cellulose D. petroleum |
12 |
| 916 | Which linkage joins monosaccharide units in sucrose? |
12 |
| 917 | 91. Biuret test is not given by (a) proteins (c) polypeptides (b) carbohydrates (d) urea. (AFI |
11 |
| 918 | Guanine is an example of: A. Nucleotide B. Nucleoside c. Purine base D. Pyrimidine base |
12 |
| 919 | Match the nucleic acid and its model from the given columns. Nucleic acid (A) DNA (p) Double helical (B) tRNA (two dimensional) (q) Clover leaf (C) tRNA (three dimensional (r) Hair pin (D) rRNA (s) L Shape A. A-p, B-q, C-s, D-r B. A-p, B-r, C-q, D-s c. A-p, B-s, C-q, D-r D. A-p, B-s, C-r, D-q |
11 |
| 920 | a) i) Name the water insoluble component of starch. ii) Mention one water soluble vitamin. iii) Is Lysine an essential or nonessential amino acid? b) Write the structure of Maltose. |
12 |
| 921 | A mixture of three proteins ( (boldsymbol{A}) ) ( (text { pepsin }),(B) ) (haemoglobin) and ( (C) ) (lysozyme) was separated by eletrophoresis method at ( boldsymbol{p} boldsymbol{H}=mathbf{7} ). The ( boldsymbol{p} boldsymbol{H} ) at isoelectric point ( (boldsymbol{p} boldsymbol{I}) ) of the proteins are ( boldsymbol{p} boldsymbol{I} ) of ( (boldsymbol{A}),(boldsymbol{B}) ) and ( (boldsymbol{C}) ) which are 1.1,6.7 and 11.0 respectively. Which of the statement are correct? This question has multiple correct options A. Pepsin ( (A) ) will migrate to the cathode B. Lysozyme ( (C) ) will migrate to the anode C. Haemoglobin will not migrate D. At ( p H=7,(A) ) and ( (C) ) would precipitate out while ( (B) ) would remain in the solution. |
12 |
| 922 | 98. Secondary structure of protein is mainly governed by (a) hydrogen bonds (b) covalent bonds (c) ionic bonds (d) disulphide bonds (e) dative bonds. (Kerala PMT) |
11 |
| 923 | Formation of both peptide and glycosidic bonds involves A. Hydration B. Dehydration c. Esterification D. Acidification |
11 |
| 924 | 2.22 Which of the following carbohydrates are branched polymer of glucose? (a) Amylose (b) Amylopectin (c) Cellulose (d) Glycogen Ans ( hd) |
11 |
| 925 | Q. 43 Why does compound (A) given below not form an oxime? de H AcO- H Aco ОАс – OH OAC H- CH2OAC (A) |
11 |
| 926 | Synthetic testosterone promotes A. menstrual cycle B. muscle growth c. respiration D. birth control agents |
12 |
| 927 | ( begin{array}{ll}text { Item ‘I’ } & text { Item ‘II’ } \ text { (compound) } & text { (reagent) } \ text { (A) Lysine } & text { (P)I-naphthol } \ text { (B)Furfural } & text { (Q)ninhydrin } \ text { (C) Benzyl alcohol } & text { (R) } K M n O_{4} \ text { (D)Styrene } & text { (S)ceric ammonium }end{array} ) ( A ) ( (A) rightarrow(Q),(B) rightarrow(P),(C) rightarrow(S),(D) rightarrow(R) ) B. ( (A) rightarrow(Q),(B) rightarrow(R),(C) rightarrow(S),(D) rightarrow(P) ) C ( .(A) rightarrow(Q),(B) rightarrow(P),(C) rightarrow(R),(D) rightarrow(S) ) D. ( (A) rightarrow(R),(B) rightarrow(P),(C) rightarrow(Q),(D) rightarrow(S) ) |
12 |
| 928 | is called as animal starch. A. Starch B. Glycogen c. cellulose D. None of the above |
12 |
| 929 | The complex formed by a pair of synapsed homologous chromosomes is called :Homologous chromosome are paired and synapsed during zygotene stage of meiosis-I and known as bivalent Arrows numbered ( 4,8, ) and 12 can all be A. NADH B. ATP ( c cdot H_{2} circ ) D. ( F A D^{+} ) or ( F A D H_{2} ) |
12 |
| 930 | The graph illustrates the data obtained from reactions of an enzyme with its specific substrate at various temperatures and at pH 6 Based on the data, what would be the result if the experiment is carried out at ( mathbf{5}^{circ} boldsymbol{C} ? ) A. No prediction would be valid B. An amount of product equal to that at ( 20^{circ} mathrm{C} ) would be formed c. An amount of product equal to that at the optimum temperature would be formed D. An amount of product equal to that at ( 60^{circ} mathrm{C} ) would be formed E. Little or no product would be formed |
11 |
| 931 | Which one of these are essential amino acids? A. Glutamic acid B. Serine c. Proline D. Tryptophan |
12 |
| 932 | Which of the two components of starch is water soluble? |
12 |
| 933 | A tetrapeptide has ( – ) COOH group on alanine. This produces glycine (Gly), valine (Val), phenyl alanine (Phe) and alanine (Ala), on complete hydrolysis. For this tetrapeptide, the number of possible sequences (primary structures) with ( N H_{2} ) group attached to a chiral centre is : ( A cdot 4 ) B. 3 ( c cdot 6 ) ( D cdot 2 ) |
12 |
| 934 | Cortisol is a: A . glucocorticoid B. mineralocorticoid c. sex hormone D. none of these |
12 |
| 935 | ACTH controls the secretion of : A. epinephrine B. cortisol c. testosterone D. aldosterone |
12 |
| 936 | a polysaccharide having ( beta-D ) glucoside units, has a stronger and more compact physical structure than starch which has ( alpha ) -D-glucsoe unit A. Cellulose B. L-Fructose c. D-Fructose D. None of these |
12 |
| 937 | 15. Glycogen is (a) a structural polysaccharide (b) structurally similar to amylopectin but extensively branched c) a polymer of B-D-glucose units (d) structurally very much similar to amylopectin. |
11 |
| 938 | Which is the correct statement? This question has multiple correct options A. Starch is a polymer of ( alpha ) -glucose. B. Amylose is a component of cellulose. C. Proteins are composed of only one type of amino acids. D. In cyclic structure of furanose, there are four carbon atoms and one oxygen atom. |
12 |
| 939 | The “lock and key” model of enzyme action illustrates that a particular enzyme molecule A. May be destroyed and resynthesised several times. B. Interacts with a specific type of substrate molecule c. Reacts at identical rates under all conditions D. Forms a permanent enzyme -substrate complex |
11 |
| 940 | What is denoted by ( X ) and ( Y ) in the given graph? A. ( x ) -Activation energy without enzyme; Y-Activation energy with enzyme B. X-Activation energy with enzyme; Y-Activation energy without enzyme. c. ( x ) -substrate concentration with enzyme; ( Y ) – Substrate concentration without enzyme. D. X-Substrate concentration without enzyme; YSubstrate concentration with enzyme. |
11 |
| 941 | Among the following, the incorrect statement is: A. Cellulose and amylose has 1,4 -glycosidic linkage B. Maltose and lactose has 1,4-glycosidic linkage C. Lactose contains ( beta ) – D-galactose and ( beta ) -D-glocose D. Sucrose and amylose has 1,2-glycosidic linkages |
12 |
| 942 | Hydrolysis of lactose with dilute acid yields: A. equimolar mixture of D-fructose and D-glucose. B. equimolar mixture of D-glucose and D-gluctose c. equimolar mixture of D-glucose and D-fructose D. equimolar mixture of D-glucose and D-galactose |
12 |
| 943 | The type of linkage present in carbohydrates is A. Peptide B. Glycosidic c. Amide D. Phosphate bonds |
11 |
| 944 | Amino acids can be identified by using the staining agent: A. ninhydrin B. sulphuric acid c. ethydium bromide D. coomassie brilliant blue |
12 |
| 945 | The enzyme which can cut molecules of DNA into segments is known as A. DNA polymerase B. DNA ligase c. Restriction enzyme D. DNA gyrase |
11 |
| 946 | Write the name of the fraction that constitutes ( 80 % ) of starch and is water insoluble. |
12 |
| 947 | Which one of the following is ( alpha ) -amino acid? A. ( N H_{2}-C_{6} H_{5}-C H-C H_{2}- ) COOH В. ( N H_{2}-C H_{2}-C H_{2}-C H_{2}-C H_{2}-C O O H ) с. ( N H_{2}-C H_{2}- )СООН D. ( N H_{2}-C_{6} H_{5}-C H-C H_{2}-C H_{2}-C O O H ) |
12 |
| 948 | Q Type your question Nuj ( (2 S, 3 R)-2 ) amino ( -3- ) hydroxybutanoic acid)? ( A ) B. ( c ) ( D ) |
12 |
| 949 | Starch is converted into disaccharide in presence of A. Diastase B. Maltose c. zymose D. Lactose |
12 |
| 950 | The two long polynucleotide chains of DNA are held together by A. Hydrogen bonds B. Covalent bonds c. Metallic bonds D. lonic bonds E. Polar covalent bonds |
11 |
| 951 | 42. The outer skin most of the crus- taceans are made up of a carbo- hydrate. This carbohydrate is (1) cellulose (2) galactose (3) chitin (4) starch |
11 |
| 952 | CU Question 6. Aldopentoses, named as ribose and 2-deoxyribose, are found in nucleic acids. What is their relative configuration? |
12 |
| 953 | Purine base with methyl substituents occurring in plants are A. Caffeine B. Theophylline c. Theobromine D. All of the above |
11 |
| 954 | Receptors of hormones are generally: A. carbohydrates B. vitamins c. lipids D. protiens |
12 |
| 955 | Why Vitamin C can’t be stored in our body? |
12 |
| 956 | If the number of moles of adenine in DNA of E.coli sample is ( 4,65,000, ) the number of moles of guanine present in its DNA is: ( left[text { Given: } frac{boldsymbol{A}+boldsymbol{T}}{boldsymbol{G}+boldsymbol{C}}=mathbf{0 . 9 3}right] ) A. 5,00,000 B. 4,65,000 c. 3,65,000 D. 9,30,000 |
12 |
| 957 | Choose the type of enzyme involved in the following reaction. ( boldsymbol{S}-boldsymbol{G}+boldsymbol{S}^{prime} longrightarrow boldsymbol{S}+boldsymbol{S}^{prime}-boldsymbol{G} ) A. Dehydrogenase B. Transferase c. Hydrolase D. Lyase E. Isomerase |
11 |
| 958 | The first sex attractant pheromone identified was that of A . cat B. Dog c. Gypsy moth D. Human |
12 |
| 959 | Assertion Two sugar units joined by ( 1,2- ) glycosidic bond in sucralose. Reason It contains ( C_{1} ) -glucose and ( C_{2} ) -fructose glycosidic bond. A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion C. Assertion is correct but Reason is incorrect D. Both Assertion and Reason are incorrect |
12 |
| 960 | 2.57 Coagulation of egg white on boiling is an example of denaturation of protein. Explain it in terms of structural changes. Ane |
11 |
| 961 | 94. Protein is a (a) polyester (c) polyethylene (b) polyamide (d) polyanhydride. |
11 |
| 962 | Question 8. What is the basic structural difference between starch and cellulose? rah and cellulose is due to |
11 |
| 963 | Proteins are composed of : A. amino acids B. carbohydrates C. vitamins D. mineral salts |
12 |
| 964 | Classify the following proteins on the basis of their molecular shapes. (a) Collagen (b) Albumin (c) Haemoglobin (d) Myosin |
12 |
| 965 | A mixture of ( alpha ) -amino acids is obtained when proteins are hydrolysed by: A. acids B. bases c. enzymes D. all of the above |
12 |
| 966 | 0.55 Describe the term D- and L-configuration used for amino acids with examples. A |
11 |
| 967 | Epimerase belongs to the class of enzymes A. Hydrolases B. Ligases c. Isomerases D. Oxidoreductases |
11 |
| 968 | The number of tripeptides possible from three different amino acids is: A ( cdot 8 ) B. 27 ( c cdot 9 ) D. 6 |
12 |
| 969 | Nucleic acids/nuclein were first discovered by A. Altmann B. Fleming c. Miescher D. Koch |
11 |
| 970 | Ester linkages occur in A. Nucleic acids B. Nucleus c. Carbohydrates D. Proteins |
11 |
| 971 | Amylopectin is a polymer of: A. ( beta ) -D-glucose B. ( alpha ) -D-glucose c. ( beta ) -D-fructose D. ( alpha ) -D-fructose |
12 |
| 972 | Hair, fingernails, hoofs are all made of: A . fat B. vitamins c. proteins D. iron |
12 |
| 973 | If the number of ( 1^{circ} ) and ( 2^{circ} ) alcoholic groups in sucrose are ( x ) and ( y, ) then the value of ( y-x ) is: |
12 |
| 974 | Starch is converted to maltose by the enzyme A. lipase B. protease c. amylase D. none of the above |
12 |
| 975 | 84. The correct structure of the dipeptide gly-ala is CH, OH IL H (a) HN-C-C-N-C-C? OH H H O – CH,SH (b) NH2-C-C-NH-CH2 – 2-OH H | O= – C- OH Ho 0 () HN-C-C-N-CH-C-OH н СН, H 0 I- o H (WBJ (d) HN-C-C-NH-C-C-OH CH,SH 2010 |
11 |
| 976 | What would be the percentage of thymine (T) and cytosine (C) in a molecule of DNA composed of approximately ( 16.2 % ) adenine ( (A) ) and 33.4% guanine (G)? A . 16.3% T and 16.3% C B. 34.1% T and 34.1% C c. ( 34.1 % ) T and ( 16.3 % ) C D. 16.3% T and 34.1% C E. 33.4% T and 16.2% C |
11 |
| 977 | Macromolecule, most diverse in cell to control physiological and chemical properties is? A. Nucleic acid B. Protein c. Glycogen D. oligosaccharide |
11 |
| 978 | The chemical name of vitamin ( C ) is: A . citric acid B. acetic acid c. ascorbic acid D. oxalic acid |
12 |
| 979 | Assertion Glucose does not gives ( 2,4-D N P ) test. Reason Glucose exists in cyclic hemiacetal form A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion c. Assertion is correct but Reason is incorrect D. Both Assertion and Reason are incorrect |
12 |
| 980 | Account for the acidity of L-ascorbic ( operatorname{acid}left(p K_{a}=4.21right) . ) Which of the following is most acidic ( H ? ) (Marked in the structures as ( H^{a}, H^{b}, H^{c} ) and ( H^{d} ) ) A ( . H^{a} ) В ( cdot H^{b} ) ( mathbf{c} cdot H^{c} ) ( mathbf{D} cdot H^{d} ) |
12 |
| 981 | Give the main sources of Vitamins ( boldsymbol{A}, boldsymbol{C} ) and ( D ). Write down the names of diseases caused by their deficiency. |
12 |
| 982 | The wavelength of ultraviolet light absorbed by nucleic acid is ( A cdot 26 n m ) B. 75 nm ( c .260 mathrm{nm} ) D. 1500 ( mathrm{nm} ) |
11 |
| 983 | Q. 47 Structures of glycine and alanine are given below. Show the peptide linkage in glycylalanine. HAN – CH2 – COOH ; H2N – CH – COOH CH3 (Alanine) (Glycince) |
11 |
| 984 | Give two examples of water soluble vitamins. |
12 |
| 985 | In plant glycolipids, the sugar is normally. A . oil B. wax c. glycolipid D. phospholipid |
12 |
| 986 | It is much easier for a small animal to run uphill than for a large animal because – ? A. small animals have lower ( O_{2} ) requirement B. the efficiency of muscles in larger animal is less than in smaller animal c. it’s easier to carry a small body weight D. smaller animals have higher metabolic rate |
11 |
| 987 | Define and give example of Essential amino acids: | 12 |
| 988 | The number of hydrogen bonds present in the sequence of a stretch of a double helical DNA ( 5^{1} ) ATGCCTAA ( 3^{1}, ) is: A . 16 B. 19 ( c cdot 24 ) D. 20 |
12 |
| 989 | Which of the following contain disulphide linkages?
This question has multiple correct options |
12 |
| 990 | Glycogen yield only glucose on hydrolysis? A. True B. False |
12 |
| 991 | The release of the energy stored in ATP molecule takes place when it A. Passes electrons to NADH. B. Splits into a phosphate ion and ADP c. Loses electrons and becomes ADP. D. Breaks its bonds and loses all its phosphate ions E. Breaks the bonds within one of its phosphate groups |
11 |
| 992 | The presence of thymine at the place of uracil also confers additional stability to DNA. How? |
11 |
| 993 | Assertion Purine bases present in DNA are adenine and guanine. Reason The base thymine is present in RNA while base uracil is present in DNA. A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion c. Assertion is correct but Reason is incorrect D. Both Assertion and Reason are incorrect |
12 |
| 994 | 55. In the following structure, HOCHZ —О ОН 4KOH Y, anomeric carbon is HO 3 OH (a) 1 (c) 3 (b) 2 (d) 4 |
11 |
| 995 | Find the odd one out. A . Meat B. Fish c. Eggs D. cheese |
11 |
| 996 | The common immediate source of energy for cellular activity is A. NAD B. ATP ( c . ) DNA D. RNA |
11 |
| 997 | 30. For the formation of osazone, glucose reacts will how many moles of phenylhydrazine? (a) 1 (b) 2 (c) 3 nuorotatory (d) 4 (BHU, UP CPMT) R |
11 |
| 998 | Which of the vitamins given below is water soluble? A. Vitamin ( C ) B. Vitamin ( D ) c. Vitamin ( E ) D. Vitamin ( K ) |
12 |
| 999 | Illustrate a glycosidic, peptide and a phosphodiester bond. What is meant by the tertiary structure of proteins? | 12 |
| 1000 | Which one is a polymer of fructose? A. Glycogen B. Starch c. Inulin D. Raffinose |
11 |
| 1001 | Nucleic acid (DNA) is not found in A. Nucleus and nucleolus B. Peroxysome and ribosome c. Mitochondria and plastid D. chloroplast and nucleosome |
11 |
| 1002 | Maltose is made of: A. ( alpha ) -D-glucose B. ( alpha, beta ) -D-glucose C . glucose and fructose D. fructose only |
12 |
| 1003 | 95. Protein is a polymer of (a) amines (c) amino acids (b) monosaccharides (d) glycerides. |
11 |
| 1004 | Three of the following statements about enzymes are correct and one is wrong. Which one of the following is wrong? A. Enzymes require optimum pH for maximal activity B. Enzymes are denatured at high temperature but in certain exceptional organisms they are effective even at temperatures ( 80-90^{circ} mathrm{C} ) c. Enzymes are highly specific. D. Most enzymes are proteins but some are lipids |
11 |
| 1005 | Nucleic acids are constituents of: A. haemoglobin B. nucleoproteins c. all proteins D. only lipid proteins |
12 |
| 1006 | To separate a mixture of monosaccharides, you would use: A. Centrifuge B. Chromatograph c. Mass spectrometer D. Electrolytic cell E. Dialysis |
12 |
| 1007 | Cane Sugar, Glucose and Starch are Carbohydrates. (a) Represent the structure of Glucose. (b) Write a method to prepare Glucose from Starch. Write the chemical equation of the reaction. (c) Suggest any two uses of Carbohydrates. |
12 |
| 1008 | The acidic hydrolysis of sucrose called inversion reaction. If true enter 1 , else enter 0 . |
12 |
| 1009 | After watching a programme on TV about the adverse effects of junk food and soft drinks on the health of school children, Sonali, a student of Class XII, discussed the issue with the school principal. The principal immediately instructed the canteen contractor to replace the fast food with the fiber and vitamins rich food like sprouts, salad, fruits etc. This decision was welcomed by the parents and the students. After reading the above passage, answer the following questions: (a) What values are expressed by Sonali and the Principal of the school? (b) Give two examples of water-soluble vitamins. |
12 |
| 1010 | Which hormone affects physical appearance? A. male and female B. steroid c. growth D. gonadotropin-releasing hormone |
12 |
| 1011 | Match the column. ( begin{array}{ll}text { Substrate } & text { Enzyme } \ text { (A) Ribonucleotide } & text { (i) Chitinase } \ text { (B) Chitin } & text { (ii) Cellulase } \ text { (C) Cellulose } & text { (iii) Ribonuclease }end{array} ) A . A-i, B-ii, C-iii B. A-iii, B-i, C-ii C . A-iii, B-ii, C-i D. A-ii, B-ii, C-iii |
11 |
| 1012 | Classify Vitamins ( A, B, C ) and ( D ) depending upon their solubility in water and fat and compare them. |
12 |
| 1013 | Hormones, enzymes and vitamins are included in same group of biochemicals because these all A. Composed of proteins B. Regulate oxidative metabolism c. synthesized in animal body D. Help to regulate the metabolism |
11 |
| 1014 | Among the following, the essential amino acid is: A. Aspartic acid B. Valine c. Alanine D. Serine |
12 |
| 1015 | 0.49 Activation energy for the acid catalysed hydrolysis of sucrose is 6.22 kJ mol-, while the activation energy is only 2.15 kJ mol- when hydrolysis is catalysed by the enzyme sucrase. Explain. Ane Enzymes the biocotohoto |
12 |
| 1016 | Choose the correct answer from the alternatives given: Which of the following will not denature a protein? A. Temperatures above ( 100^{circ} mathrm{C} ) B. Strong acids or strong bases c. Alcohol D. Distilled water |
12 |
| 1017 | Consider the following statements about sucrose and choose the wrong statement. A. Hydrolysis of sucrose with dilute acid yields an equimolar mixture of D-glucose and D-fructose B. Acid hydrolysis of sucrose is accompanied by a change in optical rotation C. In sucrose, the glycosidic linkage is between ( C-1 ) of glucose and ( mathrm{C}-2 ) of fructose D. Aqueous solution of sucrose exhibits mutarotation |
12 |
| 1018 | Proteins are biopolymers. Their monomeric units are: A. Carbohydrates B. Amino acids c. Fatty acids D. Alkenes |
12 |
| 1019 | Adding acids to cellulose gives gun- cotton from which we can make cordite. Cordite is: A. an insect repellant B. a bullet propellant c. a rocket propellant D. an insulator |
12 |
| 1020 | What does an enzyme do in terms of energy requirement of a reaction? What would happen if the enzyme did not play this role? |
11 |
| 1021 | What are the products of hydrolysis of sugar? |
12 |
| 1022 | The number of moles of acetic anhydride ( left(A c_{2} Oright) ) needed to react completely with sucrose, is: |
12 |
| 1023 | The non-proteinaceous substance, which certain enzymes require for their activity are called A. catalysts B. inhibitors c. co-enzymes D. epimers |
12 |
| 1024 | Which of the following feature is common for ( mathrm{NAD}, mathrm{NAD}^{+}, mathrm{NADP} ) ? A. They undergo oxidation reactions B. They undergo enzyme catalysis c. They undergo hydrolysis D. None of the above |
11 |
| 1025 | Which of the following is correct about starch? A. It is a white cyrstalline powder B. Coloured amorphous powder c. It is white-amorphous powder D. coloured crystalline compound |
12 |
| 1026 | a) What are monosaccharides? Write the definition? b) i) Name the products yields from the complete hydrolysis of DNA? ii) Write the structural formula of sugar moiety in DNA & RNA? c) Write the name of method related with DNA to identify the dead body in any accident? |
12 |
| 1027 | Why carbohydrates are important in our diet? | 12 |
| 1028 | Hormones produced by the anterior pituitary that have a direct effect on the body, rather than trigger another gland, are : A. TSH, ACTH, and gonadotropic hormones B. FH, LSH and progesterone c. GH, prolactin, and MSH D. testosterone and estrogen |
12 |
| 1029 | All of the following statement about feedback inhibition of enzyme is true, with an exception of A. It is exerted through allosteric effects B. It is directed at the enzyme that catalyzes the first committed step in a branch of a pathway c. It affects the rate of reaction, not the concentration of enzyme D. It acts very slowly |
11 |
| 1030 | Low levels of adrenal cortex hormones result in : A. Addison disease B. Cushing syndrome c. tetany D. goiter |
12 |
| 1031 | Question 17. What are enzymes? | 11 |
| 1032 | Which of the following is a fat soluble vitamin? ( A cdot ) Vitamin A B. Vitamin C c. Pyridoxine D. Vitamin B – complex |
12 |
| 1033 | The number of amino acids found in proteins that a human body can synthesize is: A ( cdot 12 ) B. 10 ( c cdot 5 ) D. 14 |
12 |
| 1034 | 0. 6 In disaccharides, if the reducing groups of monosaccharides, 1.2 aldehydic or ketonic groups are bonded, these are non-reducing sugat Which of the following disaccharide is a non-reducing sugar? CH2OH CHOH нион Н. (а) Кон н о мон /он но нон анон CHOH и он – о н он/онон НО он н нон CHOH но о OH # CHOH но – он (c) Ин он ни нон CH2OH нон CH OH НО ОН НА ноон н о. H OH H OH |
12 |
| 1035 | Which group belong to the same distinct class? A. Sterols, Waxes, Amino acids, Starch B. Lipids, RNA, Glycine, Cellulose c. DNA, RNA, Nucleosides, Nucleotides D. Ribose, sucrose, Glucose, Maltose |
11 |
| 1036 | Question 1. What are monosaccharides? horhy |
11 |
| 1037 | Reaction of dilute ( H C l ) with Maltose gives: A. D-glucose B. D-fructose c. D-glucose and D-fructose D. D-galactose |
12 |
| 1038 | Q. 7 Which of the following acids is a vitamin? (a) Aspartic and (b) Ascorbic acid (c) Adipic acid (d) Saccharic acid |
12 |
| 1039 | Who proposed the principle of “Induced fit”? A. Jacob B. Fischer c. koshland D. Laderberg |
11 |
| 1040 | The Muscular physique of a male is due to the influence of the Hormone is called A. testosterone B. estradiol c. progesterone D. estrone |
12 |
| 1041 | Which statements are correct about lactose? This question has multiple correct options ( mathbf{A} cdotleft(C_{1}-betaright)(O H) ) of glucose is linked with ( left(C_{4}-O Hright) ) of galactose B ( cdotleft(C_{1}-betaright)(O H) ) of galactose is linked with ( left(C_{4}-O Hright) ) of ( beta ) -glucose C. It is hydrolysed both by lase and lactase D. It exhibits mutarotation |
12 |
| 1042 | DNA and RNA have similar basic structures. A . True B. False |
12 |
| 1043 | Name the prosthetic group in following 1) Lipoprotein 2) Glycoprotein |
12 |
| 1044 | AVU (Med.) 107. The A-amino acid which does not give purple colour in the ninhydrin test is (a) proline (b) glycine (c) lysine (d) aspartic acid. TO Kart |
11 |
| 1045 | Which of the following is not a sugar? A. Sucrose B. Glucose c. Fructose D. All are sugars |
12 |
| 1046 | Choose the correct answers from the alternatives given : An exergonic reaction is A. a spontaneous reaction in which energy is given off B. an uphill reaction requiring input of energy c. an anaerobic reaction D. an oxidation reaction |
11 |
| 1047 | 0.8 Dinucleotide is obtained by joining two nucleotides together by phosphodiester linkage. Between which carbon atoms of pentose sugars of nucleotides are these linkages present? (a) 5′ and 3 (b) and 5 (c) 5′ and 5 (d) 3′ and 3 |
12 |
| 1048 | Which of the following is NOT true regarding nucleic acid? This question has multiple correct options A. Nucleic acids are always genetic material for an organism when found inside a cell B. Nucleic acids are long chain macromolecules formed by end to end polymerisation of nucleotide monomers C. Nucleic acids of only one type are available in any organism D. Nucleic acids show secondary structures |
11 |
| 1049 | The term ‘feed back’ refers to the effect of A. Substrate on the rate of enzymatic reaction B. End products on the rate of enzymatic reaction C. Enzyme concentration on its rate of reaction D. An external compound on the rate of enzymatic reactions |
11 |
| 1050 | Recognise the figure and find out the correct matching. A. A-Primary structure, B-Secondary structure B. A-Secondary structure, B-Primary structure C. A-Secondary structure, B-Tertiary structure D. A-Tertiary structure, B-Quaternary structure |
12 |
| 1051 | Sucrose is not a reducing sugar since: A. it is chemically stable. B. it contains no free aldehyde or keto group adjacent to a ( backslash C H O H ) group. C . it is built up of a fructose unit. D. it is optically active. |
12 |
| 1052 | Column Column II (Carbohydrate) |
12 |
| 1053 | Respiration is an anabolic and catabolic both. Justify the statement by giving example. |
11 |
| 1054 | Glycogenolysis is a A. Anabolic reaction B. Catabolic reaction C. Both A and B D. None of the above |
11 |
| 1055 | myosin. 0.27 Which of the following are purine bases? (a) Guanine (b) Adenine (c) Thymine (d) Uracil |
11 |
| 1056 | The light coming from the sun is stored as energy in plants by the process of photosynthesis. This happens by converting carbon dioxide and water into: A. green leaves B. carbohydrates c. fats D. plants hormones |
12 |
| 1057 | Ribozymes are A. RNA acting as enzymes. B. Antibody acting as enzymes. C. Ribosomes acting as enzymes. D. None of the above. |
11 |
| 1058 | Which polysaccharide component of carbohydrates is commonly present in bread? | 12 |
| 1059 | The figure given below show three velocity substrate concentration curves for an enzyme reaction. What do the curves a, b and c depict respectively? A. a- Normal enzyme reaction b- Competitive inhibition c- Non-competitive inhibition B. a- Enzyme with an allosteric modulator added b- Normal enzyme activity c- Competitive inhibition C. a- Enyzme with an allosteric stimulator b- Competitive inhibitor added c- Normal enzyme reaction D. a- Normal enzyme reaction b- Non-competitive inhibitor added c- Allosteric inhibitor added |
11 |
| 1060 | Write the process of making curd from milk. Explain the changes that take place in the milk? |
12 |
| 1061 | The metal present in vitamin ( B_{12} ) is: A. magnesium B. cobalt c. copper D. zinç |
12 |
| 1062 | Which of the following is a disaccharide? A. Glucose B. Fructose c. sucrose D. starch |
12 |
| 1063 | Identify disaccharides among the following: (a) Stachyose (b) Lactose (c) Maltose (d) Raffinose A ( . a, b ) в. ( d, ) ( c cdot b, e ) D. ( b, c ) |
12 |
| 1064 | Vitamin ( B_{2}, ) a water soluble vitamin is also known as: A. ascorbic acid B. riboflavin c. thiamine D. pyridoxine |
12 |
| 1065 | Which protein present in muscle is insoluble in water? A. Carotene B. Insulin c. Albumin D. Myosin |
12 |
| 1066 | Explain the major classes of enzymes. | 11 |
| 1067 | Thiamine is a A. Enzyme B. Vitamin C. Protein D. Hormone |
11 |
| 1068 | Which one of these statement is true for fibrous proteins? A. They are soluble in water B. Polypeptide chains are held together by hydrogen and disulphide bonds c. polypeptides coil together to give spherical shape D. hydrogen bond is not present |
12 |
| 1069 | Which of the following statements is not correct? A. Proteins are poly amides formed from aminoacids B. Except glycine, all other amino acids show optical activity C. Natural proteins are made up of L isomers of amino acids D. In amino acids ( mathrm{NH}_{2} ) and ( mathrm{COOH} ) groups are attached to different carbon atoms |
12 |
| 1070 | In aqueous solutions, amino acids mostly exist as: A ( . N H_{2}-C H R-C O O H ) в. ( N H_{2}-C H R-C O O^{-} ) c. ( _{N H_{3} C H R C O O H}^{+} ). D. ( H_{3} stackrel{+}{N C H R C O O} ) |
12 |
| 1071 | Assertion Deoxyribose ( C_{5} H_{10} O_{4} ) is not a carbohydrate. Reason Carbohydrates are hydrates of carbon so, compounds which follow ( C_{x}left(H_{2} Oright)_{y} ) formula are carbohydrates. A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion c. Assertion is correct but Reason is incorrect D. Both Assertion and Reason are incorrect |
12 |
| 1072 | The distance between two DNA strands is A . ( 20 AA ) в. ( 34 dot{h} ) c. ( 3.4 dot{A} ) D. 2 a |
11 |
| 1073 | The function of vitamin ( D ) is: A. calcium absorption in the intestine B. normal development of bones and teeth c. deposition of calcium and phosphate in bones D. all of the above |
12 |
| 1074 | The two main differences between RNA and DNA are: A. ribose sugar and thymine in RNA B. deoxyribose sugar and uracil in DNA c. ribose sugar and uracil in RNA D. deoxyribose sugar and guanine in DNA |
12 |
| 1075 | 32. Sucrose is not a reducing sugar since (a) it is chemically stable (b) it contains no free aldehyde or keto group adjacent to CHOH a group (c) it is built up of a fructose unit (d) it is optically active. (Karnataka CET) |
11 |
| 1076 | Which of the following is not an example of phytohormone? A. cytokinins B. ethylene c. auxins D. insulin |
12 |
| 1077 | The function(s) of oxytocin is/are to : A. stimulate the release of milk from the mother’s mammary glands when her baby is nursing. B. cause the uterus to contract c. induce labor D. all of the above |
12 |
| 1078 | What are the expected products of hydrolysis of lactose? |
12 |
| 1079 | GC / AT ratio in E. coli is A . 0.93: 1 B. 1: 0.93 c. 1: 1.52 D. 1.52: |
12 |
| 1080 | Which of the following vitamins is oil soluble? ( A cdot A ) B. B 6 ( c cdot B_{12} ) D. B ( _{1} ) |
12 |
| 1081 | Assertion Insulin is a globular protein. Reason It has two polypeptide chains with 21 and 30 amino acids joined by sulphur bridges connecting cysteine amino acid on the two chains. A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion C. Assertion is correct but Reason is incorrect D. Assertion is incorrect but Reason is correct |
12 |
| 1082 | Which of the following is called “biological middle man”? A. Hormone B. Vitamin c. Enzyme D. All of the above |
11 |
| 1083 | For ‘invert sugar’, the correct statement(s) is (are) (Given : specific rotations of ( (+)- ) sucrose, ( (+) ) -maltose, ( L-(-) ) -glucose and L-(+)-fructose in aqueous solution are ( +66^{0},+140^{0},-52^{0} ) and ( 92^{0} ) respectively A. ‘invert sugar’ is prepared by acid catalyzed hydrolysis of maltose B. ‘invert sugar’ is an eqimolar mixture of D-(+)-glucose and D-(-)-fructose C . specific rotation of ‘invert sugar’ is ( -20^{circ} ) D. on reaction with ( B r_{2} ) water, ‘invert sugar’ forms saccharic acid as one of the products |
12 |
| 1084 | The correct statement about the following disaccharide is: ( (mathbf{i}) ) il A. ring (i) is pyranose with ( alpha- ) glycosidic link B. ring (i) is furanose with ( alpha- ) glycosidic link C . ring (ii) is furanose with ( alpha- ) glycosidic link D. ring (ii) is pyranose with ( beta- ) glycosidic link |
12 |
| 1085 | Write two differences each in the following: (i) DNA and RNA, (ii) ( alpha ) -Amino acid and Protein. |
12 |
| 1086 | 38. The hydrophilic nature of DNA is due to the presence of : (1) thymine base (2) a number of hydrogen bonds (3) phosphate group (4) deoxyribose sugar |
11 |
| 1087 | The energy currency of the cell is | 11 |
| 1088 | Question 8. a-helix is a secondary structure of proteins formed by twisting of polypeptide chain into right handed screw like structures. Which type of interactions are responsible for making the a- helix structure stable? |
12 |
| 1089 | The volume of ( 10 mathrm{N} ) and ( 4 mathrm{N} ) HCl required to make 1 L of 7 N HCl are: A. ( 0.5 mathrm{L} ) of ( 10 mathrm{N} ) HCl and 0.4 Lof ( 4 mathrm{N} ) HC (1) B. 0.6 L of 10 N HCl and 0.6 L of 4 N HCI c. 0.8 L of ( 10 mathrm{N} ) HCl and ( 0.7 mathrm{L} ) of ( 4 mathrm{N} ) HC D. 0.75 L of 10 N HCl and 0.4 L of 4 N HCI |
12 |
| 1090 | What is the incorrect option for sucrose? ( A cdot ) It is also named as invert sugar B. It is a non reducing sugar. C. The glycosidic linkage present is ( beta-1,4^{prime}-g l y ) cosidic bond D. One of the hydrolysis product is glucose |
12 |
| 1091 | Number of binding sites in allosteric enzyme is A. one B. Two c. Three D. Four |
11 |
| 1092 | Which of the following is found in body? This question has multiple correct options ( A cdot P b ) B. cad ( c cdot F e ) D. co |
12 |
| 1093 | TULI) 42. The linkage between the two monosaccharide uni lactose is (a) C, of -D-glucose and C4 of B-D-galactose (b) C. of B-D-galactose and C4 of ß-D-glucose (c) C, of a-D-galactose and C4 of ß-D-glucose (d) C of B-D-galactose and C4 of a-D-glucose (e) C of a-D-glucose and C4 of a-D-glucose. |
11 |
| 1094 | Number of ( C=O ) groups in thymine and ( mathrm{X} ) are equal. Now, ( mathrm{X} ) is A. cytosine B. uraci c. adenine D. guanine |
12 |
| 1095 | ATP was discovered by A. Lipmann B. Lohmann c. Blackman D. Bowman |
11 |
| 1096 | Correct order of molecular weight is A. DNA <rRNA<tRNAA B. DNA <mRNA <rRNA ( c . ) tRNA ( < ) mRNA ( < ) DNA D. tRNA ( < ) DNA ( < ) mRNA |
11 |
| 1097 | What are the hydrolysis products of sucrose? A. Fructose + Fructose B. Glucose + Glucose c. Glucose + Galactose D. Glucose + Fructose |
12 |
| 1098 | Protein denaturation results in: A. change of primary structure B. change of secondary structure c. change of tertiary structure D. change in both secondary and tertiary structures |
12 |
| 1099 | Aspartame, an artificial sweetener, is a peptide and has the given structure. Which of the following is correct about the molecule? This question has multiple correct options A. It has four functional groups B. It has three functional groups c. on hydrolysis, it produces only one amino acid D. On hydrolysis, it produces a mixture of amino acids |
12 |
| 1100 | Which is a monosaccharide among the following? A. sucrose B. Cellulose c. Maltose D. Glucose |
12 |
| 1101 | The statement ‘Sucrose has ( C_{1}-C_{2} ) glycosidic linkage between ( beta ) -D-Glucose & ( alpha ) -D-Fructose’ is A. True B. False |
12 |
| 1102 | Except blood, the cells of connective tissue secrete certain substances that act as matrix. These substances are A. Conjugated proteins B. signalling molecules c. cholesterol D. Modified polysaccharides |
11 |
| 1103 | Which of the following compounds is reasonable for the transmission of hereditary characters? A. RNA B. DNA c. Glucose D. Haemoglobin |
12 |
| 1104 | (a) Write the Haworth structure of sucrose. (b) Sucrose is a non-reducing sugar. Why? |
12 |
| 1105 | An ATP molecule is structurally most similar to a molecule of A. RNA molecule B. Vitamin molecule c. Amino acid D. Fatty acid |
11 |
| 1106 | Nucleic acid occurs in A . Golgi body B. Lysosomes c. Cytoplasm D. Mitochondria and chloroplast |
11 |
| 1107 | An important step in the manufacture of pulp in paper industry from woody tissues of plants is A. Preparation of pure cellulose by removing lignin. B. Treatment of wood with chemicals for breakdown of cellulose. C. Removal of oil by suitable chemicals D. Removal of water from wood by prolonged heating at ( 50^{circ} mathrm{C} ) |
11 |
| 1108 | Which of the following statement is correct? A. Acetophenone is an ether B. Diastase is an enzyme c. cycloheptane is aromatic D. All of the above |
11 |
| 1109 | One insulin molecule contains: A. Three peptide chains, two persulphide linkages. B. Two peptide chains, two persulphide linkages. C. Two peptide chains, three persulphide bonds. D. Three peptide chains, three persulphide bonds. |
12 |
| 1110 | An enzyme which catalyses the conversion of aldose sugar to ketose would be classified as A. Transferases B. Isomerases c. Hydrolases D. Ligases |
11 |
| 1111 | 90. Isoelectric point of glycine is (a) 8.6 (b) 7 (c) 12.4 (d) 6.2 |
11 |
| 1112 | Which of the following essential amino acid is present in wheat? A. glycine B. alanine c. Iysine D. serine |
12 |
| 1113 | The basic amino acids are: A. Iysine, arginine B. alanine, glutamic acid c. proline, valine D. alanine, cystein |
12 |
| 1114 | Carbohydrates are A. used to make a paper B. produced as an intermediate in the synthesis of proteins C. the polyhydroxy aldehyde or polyhydroxy ketone D. all of these |
12 |
| 1115 | Anabolic reactions are always endergonic reactions. Justify this statement with an example. |
11 |
| 1116 | Question 6. What is glycogen? How is it different form starch? Solution Cum hide Carbohidrate hichic et |
11 |
| 1117 | Chemical composition of a cell’s components approx. % dry weight A. Carbohydrate, protein, fat, and nucleic acid B. Protein, fats, nucleic acid and carbohydrate C. Protein, fats, carbohydrates and nucleic acid. D. Carbohydrate, fats, proteins and nucleic acid |
11 |
| 1118 | Adenine pairs with thymine through: A. two hydrogen bonds B. one hydrogen bond c. three hydrogen bonds D. four hydrogen bonds |
12 |
| 1119 | ‘Snake’ and ‘wolves’ are examples of A. Secondary Consumers B. Primary consumers c. Tertiary Consumers D. consumers |
12 |
| 1120 | The carrier of an amino acid for protein synthesis is A . t-RNA B. m-RNA c. r-RNA D. DNA |
12 |
| 1121 | Q. 1 Glycogen is a branched chain polymer of is formed by Cl-C4 glycosidic linkage 1 is a branched chain polymer of a-D glucose units in which chain u by C-C4 glycosidic linkage where as branching occurs by the ration of C1-C6 glycosidic linkage. Structure of glycogen is similar to (a) amylose (b) amylopectin (c) cellulose (d) glucose |
12 |
| 1122 | Find and write down structures of 10 interesting small molecular weight biomolecules. Find if there is any industry which manufactures the compounds by isolation. Find out who are the buyers? |
11 |
| 1123 | In plants, enzymes are present A. Only in flowers B. Only in leaves C. In all the living cells of plant body D. Only in parenchyma |
11 |
| 1124 | is the best evidence for the lock and key theory of enzyme reaction. A. All isolated enzymes have been identified as proteins. B. Compounds similar in structure to substrate inhibit reactions C. Enzymes are found in living organisms speed up certain reactions D. Enzymes determine the direction of reaction |
11 |
| 1125 | Extremely dangerous and deadly cardiac glycosides are carried from the milkweed plant by the? A. Night cockroaches B. Bumble bee c. Larvae of the monarch butterfly D. Green grasshopper |
12 |
| 1126 | The pH value of a solution in which a polar amino acid does not migrate under the influence of electric field is called: A. isoelectronic point B. isoelectric point c. neutralization point D. all of the above |
12 |
| 1127 | Starch is made by photosynthesis in the leaves of plants. It is found in rice, potatoes, and many vegetables sources. It can be detected with a drop of iodine. In the presence of starch, iodine: A. vapourises B. turns blue c. decolourises D. turns into a black solid |
12 |
| 1128 | An example of disaccharide is A. Glucose B. Ribose c. cellulose D. Lactose |
12 |
| 1129 | The storage form of food in plants and animals are A. Starch and glycogen B. Starch and cellulose c. Glycogen and cellulose D. Starch in both |
11 |
| 1130 | ( (boldsymbol{A}) ) ( (C) stackrel{H_{3} O^{oplus}}{longrightarrow}(D) ) Which statements are correct about the reaction of maltose? This question has multiple correct options A. Product ( (C) ) is: B. Product ( (C) ) is c. Product ( (D) ) are D. Products ( (D) ) are 2 mol ( alpha ) – and ( beta ) -D-glucose |
12 |
| 1131 | 8 5 is most stable? ( A ) B. ( c ) ( D ) |
12 |
| 1132 | Which of the following is correct pair of pyrimidine bases? A. Adenine & Thymine B. Adenine & Guanine c. Thymine & Cytosine D. Guanine & Cytosine |
11 |
| 1133 | Enzyme amylase belongs to class A. Transferases B. Hydrolases c. Isomerases D. Oxidoreductases |
11 |
| 1134 | Q. 9 Nucleic acids are the polymers of (a) nucleosides (b) nucleotides (c) bases (d) sugars Ane (6) Men uninntidor in which nucleic acids are linked together by |
11 |
| 1135 | Match the following. A. Homeostasis 1) Insulin B. Emergency hormone 2) Structure of insulin C. Metabolism 3) Adrenaline D. Peptide hormones 4) Thyroxine E. Pancreatic islets 5) Maintenance of constant internal environment F. Sanger 6) Affect the properties of Plasma membrane ( A cdot A-1 ; B-5 ; C-3 ; D-4 ; E-6 ; F-2 ) B. ( A-2 ; B-4 ; C-3 ; D-1 ; E-6 ; F-2 ) ( mathrm{C} cdot mathrm{A}-3 ; mathrm{B}-5 ; mathrm{C}-3 ; mathrm{D}-4 ; mathrm{E}-6 ; mathrm{F}-1 ) D. ( A-5 ; B-3 ; C-4 ; D-1,6 ; E-1 ; F-2 ) |
12 |
| 1136 | 0.53 Which monosaccharide units are present in starch, cellulose and ou and which linkages link these units? ord chucose can be determis |
12 |
| 1137 | Consider the following structures. Which of the following pairs represent D- and L-fructose respectively? A. II and I B. I and III c. III and IV D. II and IV |
12 |
| 1138 | In which of the following groups all are polysaccharides? A. Sucrose, glucose and fructose B. Maltose, lactose and fructose c. Glycogen, sucrose and maltose D. Glycogen, cellulose and starch |
11 |
| 1139 | Which of the following is incorrect about polysaccharides? I. These are amorphous solids. II. These are sparingly soluble in water. III. These are sugars A . Only III B. Il and II c. I and III D. All of the above |
12 |
| 1140 | 92. Which of the following amino acid do not have primary amino functional group? (a) Alanine (b) Isoleucine (c) Leucine (d) Proline a) Alanine (1) Isoleucin (AMIL (Mod |
11 |
| 1141 | Raffinose on hydrolysis gives: A. Two monosaccharides B. Three monosaccharides c. one disaccharide and one monosacharide D. Two monosaccharides and one disaccharide |
12 |
| 1142 | Which one of the following is without coenzyme activity? A. Vitamin B B. Thiamine c. Biotin D. Riboflavin |
11 |
| 1143 | Explain chemical constituents of DNA | 11 |
| 1144 | Jacob and Monad named those enzymes allosteric whose activity is regulated by A. Substrate B. End product c. coenzymes D. Prosthetic groups |
11 |
| 1145 | The factor that can reduce the enzyme activity is I. Increasing pH level II. Decreasing temperature III. Placing enzyme in a nonpolar liquid A. I only B. II only c. ॥ only D. I and II E. I, II, and III |
11 |
| 1146 | Which reactions usually release energy that is used to drive chemical reactions. A. Anabolic B. Catabolic c. Photosynthesis D. None of the above |
11 |
| 1147 | mRNA part that codes for the amino acid serine, is: A. AMP B. ADP c. uca D. d ATP |
12 |
| 1148 | 62. Pick out the incorrect statement(s) from the following 1. Glucose exists in two different crystalline forms, a-D-glucose and B-D-glucose 2. -D-glucose and B-D-glucose are anomers 3. C-D-glucose and B-D-glucose are enantiomers 4. Cellulose is a straight chain polysaccharide made of only ß-D-glucose units 5. Starch is a mixture of amylose and amylopectin. both contain unbranched chain of a-D-glucose units (a) 1 and 2 only (b) 2 and 3 only (c) 3 and 4 only (d) 3 and 5 only (e) 4 and 5 only (Kerala PMT) |
11 |
| 1149 | Vitamin A is known as: A. thiamine B. pyridoxine c. retinol D. tocopherol |
12 |
| 1150 | Biomolecules are formed by certain specific linkages between simple monomeric units. Write the names of linkages and monomeric units in the following class of biomolecules. (i) Starch (ii) Protein (iii) Nucleic acid. |
12 |
| 1151 | Explain the structure of fructose. | 12 |
| 1152 | Nucleosome contains A. Only histone protein B. Both DNA and histone protein c. Only DNA D. Both DNA and RNA |
11 |
| 1153 | The prosthetic group present in nucleoproteins is A. nucleic acids B. lipids c. carbohydrates D. phosphoric acid |
12 |
| 1154 | ( K_{m} ) value of enzyme is substrate concentration at A ( cdot 1 / 4 V_{max } ) B. ( 2 V_{max } ) c. ( 1 / 2 V_{max } ) D. ( 4 V_{max } ) |
11 |
| 1155 | Which of the following is/are ( alpha ) -amino acid? ( A ) B. c. Both (A) and (B) D. None of these |
12 |
| 1156 | Which enzyme induces lysis of fibrinogen to fibrin during fibrinolysis? A. Plasmin B. Thrombin c. Fibrin D. Trypsin |
11 |
| 1157 | Q. 26 In fibrous proteins, polypeptide chains are held together by ……… (a) van der Waals forces (b) disulphide linkage (c) electrostatic forces of attraction (d) hydrogen bonds |
12 |
| 1158 | 2013 87 Assertion : All enzymes are made up of proteins and all proteins have three dimensional structures. Reason: Secondary structures of protein are sequence of amino acids. (a) If both assertion and reason are true and reason is the correct explanation of assertion. (b) If both assertion and reason are true but reason is not the correct explanation of assertion. (c) If assertion is true but reason is false. (d) If both assertion and reason are false. (AIIMS) |
11 |
| 1159 | Polymer of ( alpha ) -D glucose is A. Cellulose B. Glycogen c. Inulin D. Chitin |
11 |
| 1160 | When sucrose is heated with concentrated nitric acid the product is: A. Saccharic acid B. Oxalic acid c. Formic acid D. Invert sugar |
12 |
| 1161 | Which of the following is a naphthaquinone derivative? A. Vitamin K B. Vitamin D c. Vitamin A D. Vitamin B 5 |
12 |
| 1162 | In catabolic series of reaction, complex molecules are broken down into smaller molecules releasing A. water B. Oxygen c. Energy D. Nutrients |
11 |
| 1163 | Which statement is incorrect about ( boldsymbol{O} ) peptide bond ( -stackrel{|}{C}-stackrel{bullet}{N} H-? ) A. ( C-N ) bond length in proteins is longer than usual bond length of ( N ) -bond B. Spectroscopic analysis shows planar structure ( o- ) ( C_{0}-N H-operatorname{grou} ) 0 c. ( C-N ) bond length in proteins is smaller than usual bond length of ( C-N ) bond D. None of the above |
12 |
| 1164 | Select the correct option: Select the right option regarding the given graph. A. ( x ) – axis = Rate of reaction ( Y ) – axis = Enzymatic activity B. ( x ) -axis = Enzymatic activity ( Y ) – axis = Rate of reaction c. ( x ) -axis = Enzymatic activity ( Y ) – axis = pH/Temperature D. ( x ) – axis = pH/Temperature Y-axis = Enzymatic activity |
11 |
| 1165 | 36. Two richest known sources of edible protein are (1) Meat and eggs (2) Some algae and other micro- organisms (3) Soyabean and groundnut (4) Milk and leafy vegetables |
11 |
| 1166 | What is transmitted from parent cells to daughter cells during cell division? A. DNA B. tRNA c. mRNA D. rRNA E. RNA polymerase |
11 |
| 1167 | What are the products of hydrolysis of maltose? |
12 |
| 1168 | Which one of the following is an essential amino acid? A. Tyrosine B. Cysteine c. Isoleucine D. serine |
12 |
| 1169 | 99. In aqueous solution, an amino acid exists as (a) cation (b) anion (c) dianion (d) zwitter ion (e) neutral molecule. (Kera |
11 |
| 1170 | Which of the following vitamin is insoluble in water and fat both? A. B. ( c cdot H ) D. |
12 |
| 1171 | As shown in the image, a series of enzymes catalyze the reaction that changes Molecule A into Molecule C. Molecule ( C, ) functions as a corepressor for the operon controlling production of Enzyme A when it binds with Molecule D. If no Molecule D is present, which of the following is the most likely result of the presence of large amounts of Molecule C? A. Concentration of Enzyme A will decrease. B. Concentration of Enzyme A will increase c. concentration of Molecule A will increase D. Concentration of Enzyme B will decrease |
11 |
| 1172 | What kind of bonding is responsible for the secondary structure of proteins? A. Covalent bonding B. Hydrogen bonding c. lonic bonding D. Van der Waal’s forces |
12 |
| 1173 | The number of subunits present in haemoglobin are: A . 2 B. 3 ( c cdot 4 ) ( D ) |
12 |
| 1174 | 84. The correct structure of the dipeptide gly-ala is CH, H| 1 IZ (a) HN-C -C- C| OH H CH,SH (b) NH2-C-C-NH-CH2-C-OH 2 H II O Ho 0. (C) H,N-ċ-C-N-CH-C-OH H CH, H OO (d) H2N-C-C-NH-C-C-OH H CH,SH (WB JE |
11 |
| 1175 | What structural feature distinguishes proline from other natural ( alpha ) -amino acids? A. It is optically inactive B. It contains aromatic group c. It is a di carboxylic acid D. It has a secondary amine |
12 |
| 1176 | Apoenzyme is a A. Protein B. Carbohydrate c. vitamin D. Amino acid |
11 |
| 1177 | Assertion Genes are stretches of DNA that make up the different codes for the different proteins. Reason DNA is the complex bio molecule made up of sugars,phosphorus and nitrogen bases A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion c. Assertion is correct but Reason is incorrect D. Both Assertion and Reason are incorrect |
11 |
| 1178 | Which of the following is a non-reducing sugar? A. Glucose B. Sucrose c. Maltose D. Lactose |
12 |
| 1179 | Which one of the following is known as energy currency of cell? A. Adenosine diphosphate B. Adenosine triphosphate c. Pyruvate D. Glucose |
11 |
| 1180 | Classify Amino acids on basis of function and on basis of Nature of amino acids. |
12 |
| 1181 | Which of the following is a derivative of amino acid? A. Thyroxine B. Estradiol c. Estrone D. Progesterone |
12 |
| 1182 | ( mid ) ( N ) ( mathrm{O} ) ( | ) ( -mathrm{C}-mathrm{N}- ) ( mathrm{O} ) ( | ) ( mathrm{C} ) ( left(begin{array}{cc}mathrm{H} & mathrm{H} \ mathrm{I} & mathrm{I} \ -mathrm{C} & mathrm{C}- \ mathrm{I} & mid \ mathrm{H} & mathrm{H}end{array}right) ) |
11 |
| 1183 | ( boldsymbol{alpha}-boldsymbol{D}-boldsymbol{G} boldsymbol{l} boldsymbol{u} operatorname{cose} ) and ( boldsymbol{beta}-boldsymbol{D}- ) Glucose are not: A. Epimers B. Anomers c. Enationers D. Diastereomers |
12 |
| 1184 | Glycogen is a branched chain polymer of ( alpha-D- ) glucose units in which chain is formed by C-1 – C-4 glycosidic linkage whereas branching occurs by the formation of C-1 – C-6 glycosidic linkage. Structure of glycogen is similar to A. amylose B. amylopectin c. cellulose D. glucose |
12 |
| 1185 | Q. 37 Which sugar is called invert sugar? Why is it called so? | 12 |
| 1186 | The given figure shows a graph representing reaction rate versus substrate concentration. The last part of the curve shows the plateau formation because A. A noncompetitive inhibitor is present B. A competitive inhibitor is present C. All the substrate has been converted to product D. The active site is saturated with substrate |
11 |
| 1187 | The primary target organ of aldosterone is : A. the kidney B. the pancreas C. the liver D. all of the above |
12 |
| 1188 | Enzymes: A. accelerate bio-chemical reactions B. consists of amino acids C. have optimum activity at body temperature D. have all these properties |
11 |
| 1189 | Which can give both carbylamine test and carric ammonium nitrate test? A. Asn-Gln B. Lys-GIn c. Asp-Lys D. Lys-Ser |
12 |
| 1190 | Cyanocobalamin is rich in: A. sewage sludge B. liver of pig ( c cdot operatorname{egg} ) D. all of these |
12 |
| 1191 | 53. The letter ‘D’in D-glucose signifies (a) configuration at all chiral carbons (b) dextrorotatory (c) that it is a monosaccharide (d) configuration at a particular chiral carbon. ( Krnatal |
11 |
| 1192 | Which of the following is a fibrous protein? A. Haemoglobin B. Albumin c. Keratin D. Insulin |
12 |
| 1193 | Q. 31 In nucleoside, a base is attached at 1′ position of sugar moiety Nucleotide is formed by linking of phosphoric acid unit to the sugar unit of nucleoside. At which position of sugar unit is the phosphoric acid linked in a nucleoside to give a nucleotide? |
11 |
| 1194 | The RNA which takes part in the synthesis of proteins is: A. m-RNA B. r-RNA c. t-RNA D. All of the above |
12 |
| 1195 | Which of the following is not correct? A ( . D(-) ) Fructose exists in furanose structure. B. ( D(+) ) Glucose exists in pyranose structure. C. In sucrose, the two monosaccharides are held together by peptide linkage. D. Maltose is a reducing sugar. |
12 |
| 1196 | 3. In organic chemistry we study about (a) Carbohydrates (b) Fertilizers (c) Proteins (d) Ceramics |
12 |
| 1197 | Q. 24 Lysine, HN – (CH2). -CH-COOH is ……… NH2 (a) a-amino acid (c) amino acid synthesised in body (b) basic amino acid (d) B-amino acid |
11 |
| 1198 | An oligosaccharide (A) on hydrolysis gives 5 molecules of aldohexoses. The number of ‘H’ atoms in 1 molecule of (A) are equal to ( 10 x+y ) where ( x ) and ( y ) are single digit natural numbers. Calculate(x-y). |
12 |
| 1199 | Which is not true statement? A. -carbon of -amino acid is asymmetric B. all proteins are found in L-form. C. human body can synthesize all proteins they need. D. at ( p H=7 ) both amino and carboxylic groups exist in ionised form. |
12 |
| 1200 | No. of chromosomes present in human cell is: A . 46 B. 23 ( c cdot 2.3 ) D. 4.6 |
12 |
| 1201 | Which of the following statement is incorrect? Choose answer: A. The acid insoluble fraction, has only four types of organic compounds, proteins, polysaccharides nucleic acids and lipids B. Chemical compounds found in living organisms are of two types, acid soluble and acid insoluble C. The compounds which are found in the acid insoluble fraction are called micromolecules D. The acid soluble pool represents roughly the cytoplasmic composition |
11 |
| 1202 | Glycogen, on hydrolysis, gives: A . lactose and glucose B. only glucose c. glucose and fructose D. glucose and maltose |
12 |
| 1203 | Select the correct option: Read the given statements. I. Fructose is the sweetest sugar. ii. Glycine is the simplest amino acid. iii. Lactose is a disaccharide composed of one molecule each of glucose and galactose. iv. Cellulose is an unbranched chain of glucose molecules linked by ( beta 1,4 ) glycosidic bond. Which of the given statements are correct? A ( cdot ) (i) and (ii) B. (iii) and (iv) c. (i), (ii) and (iii) D. (i), (ii), (iii) and (iv) |
11 |
| 1204 | Joining of repeating units to form a macromolecule is called A. Polymerisation B. Aggregation c. Polymorphism D. Condensation |
11 |
| 1205 | Mark the wrong statement about enzymes A. enzymes are biological catalysts B. each enzyme can catalyse a number of similar reactions C. enzymes are very efficient catalysts D. enzymes are needed only in very small amounts for their action |
12 |
| 1206 | Among the following essential amino acid is: A. alanine B. valine c. proline D. serine |
12 |
| 1207 | What are vitamins? Write various kinds of vitamins? |
12 |
| 1208 | Which of the following is a dicarboxylic acid with one double bond? A. Ethylene B. Traumatic acid c. Absicic acid D. Auxins |
12 |
| 1209 | Which enzyme converts glucose to ethanol? A . Diesterase B. Invertase c. zymase D. Both (2) and (3) |
12 |
| 1210 | The amino acid containing mercaptan unit is: A. leucine B. glutamine c. cysteine D. Iysine E. isoleucine |
12 |
| 1211 | A metal present in vitamin ( B_{12} ) is: A. aluminium B. zinç ( c ). iron D. cobalt |
12 |
| 1212 | Sulphur is required in plants, as a nutrient element for: A. making hormones B. absorption of water c. making vitamins D. absorption of fat |
12 |
| 1213 | The hormones that have ‘anti inflammatory’ effect are the: A. Thyroxin B. Insulin c. Glucocorticoids D. Auxins |
12 |
| 1214 | 0.62 Assertion (A) B-glycosidic linkage is present in maltose. Reason (R) Maltose is composed of two glucose units in which C-1 of one glucose unit is linked to C-4 of another glucose unit. And portion in wong |
12 |
| 1215 | Which among the following is a competitive inhibitor of succinic dehydrogenase? A . ( alpha ) -ketoglutarate B. Malate c. Malonate D. Oxaloacetate |
11 |
| 1216 | C. 69 Carbohydrates are essential for life in both plants and animals. Name the carbohydrates that are used as storage molecules in plants and animals, also name the carbohydrate which is present in wood or in the fibre of cotton cloth. |
11 |
| 1217 | Q. 4 Which of the following pairs represents anomers? сно CHO CHO CHO н—— он Но ——н ОН НО н — он но ОН НО н (а) но —н нон (b) нон анон н — он н — он н — он но — н н — он н – он н — он но — н СНеон Снеон CH2OH СН2ОН н (с) н но н О -он нo -н н — он нон — он | н он (d) н — он но -н – н нон нон тн- он — он н Он н — он но — Н н- CH2OH сн.Он Снон CH2OH II |
12 |
| 1218 | What is the correct letter code for tryptophan? ( A cdot w ) B. Y ( c cdot L ) ( D ) |
12 |
| 1219 | Among the following compounds most basic amino acid is: A. Iysine B. asparagine c. serine D. histidine |
12 |
| 1220 | Globular proteins are present in? A. blood B. eggs ( c . ) milk D. all of these |
12 |
| 1221 | Ultimate products of hydrolysis of protein in: A . aniline B. aliphatic acid c. amino acid D. aromatic acid |
12 |
| 1222 | Fructose ( frac{B r_{2} / H_{2} O}{?} ? ) | 12 |
| 1223 | name two water soluble vitamins, their sources and the diseases caused due to their deficiency in diet. |
12 |
| 1224 | The polysaccharide among the following is : This question has multiple correct options A. Glucose B. Cellulose c. starch D. sucrose |
12 |
| 1225 | . 15 There cyclic structures of monosaccharides are given below which of these are anomers. I I HOH | HI-OHT H | HOTH HOH IOI II HO1H | HI-OH HO |—H . HHH H- CH2OH CHOH CHOH (a) I and II (c) I and III (b) || and III (d) III is anomer of I and II |
12 |
| 1226 | Fructose on reduction gives a mixture of two alcohols which are related as: A. Diastereomers B. Epimers c. Both (a) and (b) D. Anomers |
12 |
| 1227 | Choline is present in | 12 |
| 1228 | When an amino acid solution which is slightly alkaline is subjected to electrolysis, the resulting component migrates towards A. Cathode due to zwitter ion formation. B. Anode due to the conversion of zwitter ion to negative ion c. Migrate to cathode due to the conversion to negative ion D. One component towards cathode and the other towards anode due to the zwitter ion formation |
12 |
| 1229 | Which one of the following is laevorotatory? A. glucose B. fructose c. sucrose D. all the above |
12 |
| 1230 | Which protein is found in maximum amount A. Catalase B. Zinc carbonic anhydrase c. Transferase D. RUBISCO |
11 |
| 1231 | Energy currency/coin of cell is A . ATP B. NAD c. ADP D. GDP |
11 |
| 1232 | Which is a homopolysaccharide? A. Pectin B. Heparin c. Hyaluronic acid D. Inulin |
11 |
| 1233 | Match the items listed in column I with Column II and mark the correct option. Column I Column II a. Glycosidic bond (i) Protein detection b. Tertiary structure (ii) Dehydration reaction c. Biuret test (iii) Formation of d. single alphabet catalytic site code ‘P’ (iv) Proline ( A cdot a-(i), b-(i i), C-(i v), d-(i i i) ) B. ( a-(text { iii) }, b-(i i), C-(i v), d-(i) ) C ( cdot a-(text { ii }), b-(text { iii }), C-(i), d-(i v) ) D. a – (iii), b – (iv), C – (ii), d – (i) |
11 |
| 1234 | Define the following terms with a suitable example: Fibrous protein |
12 |
| 1235 | The most abundant organic compound in the world is: A . cellulose B. alkaloids c. methane D. chlorophyll |
12 |
| 1236 | Cellulose contains so many ( O H ) groups, it is insoluble in A . water B. banzene c. both ( A ) and ( B ) D. none of these |
12 |
| 1237 | The DNA strands are antiparallel because of the presence of A. H-bonds B. Peptide bonds c. Disulphide bonds D. Phosphate-diester bonds E. None of the above |
11 |
| 1238 | Co-enzyme is A. Always a protein B. Often a vitamin C. Always an inorganic compound D. Often a metal |
11 |
| 1239 | Which of the following is incorrect? A. Phosphate is covalently bonded to nitrogenous base B. Sugar is covalently bonded to nitrogenous base C. Nitrogenous bases are hydrogen bonded to each other D. Sugar and nitrogenous bases from peptide bonds |
11 |
| 1240 | Enzymes concerned with transfer of electrons are A. Hydrolase B. Dehydrogenase c. Transaminase D. Deoxygenase |
11 |
| 1241 | Which of these elements is not found in nitrogenous base? A. Nitrogen B. Hydrogen c. carbon D. Phosphorus |
11 |
| 1242 | What is the cellulose made part that encircle the cell? |
12 |
| 1243 | DNA strands are joined by A. Oxygen bonds B. Hydrogen bonds c. Carbon bonds D. Nitrogen bonds |
11 |
| 1244 | Complete nucleic acid hydrolysis yields all the following, except A. Phosphoric acid B. Purines c. Pentoses D. Adenosine |
11 |
| 1245 | Urease is : ( A cdot ) a vitamin B. an enzyme c. a protein D. an amino acid |
11 |
| 1246 | What are monosaccharides? Explain denaturation of proteins. | 12 |
| 1247 | 41. Which one of the following is not an aldose? (a) Glucose (b) Ribose (c) Fructose (d) Mannose (J & |
11 |
| 1248 | Enzymes that catalyse inter-conversion of optical, geometrical or positional isomers are A . Ligases B. Lyases c. Hydrolases D. Isomerases |
11 |
| 1249 | What type of glycoside linkage is the following? A ( cdot alphaleft(1 rightarrow 4^{prime}right) ) В ( cdot betaleft(1 rightarrow 4^{prime}right) ) c. ( alphaleft(1 rightarrow 6^{prime}right) ) D. ( betaleft(1 rightarrow 6^{prime}right) ) |
12 |
| 1250 | Explain the preparation of glucose from cane sugar |
12 |
| 1251 | 161. A peptide hormone is (a) estrone (c) insulin (e) progesterone. (b) testosterone (d) corticoid (Kerala |
12 |
| 1252 | lodine gives blue colour with: A . glucose B. lactose c. starch D. heparin |
12 |
| 1253 | One picogram (pg) is equal to how many base pairs (bp)? A ( cdot 1 times 10^{9} ) B . ( 0.965 times 10^{9} ) c. ( 0.965 times 10^{10} ) D. ( 0.963 times 10^{8} ) |
11 |
| 1254 | Which of the following statements is not true about RNA ? A. It has always double stranded ( alpha ) -helix structure. B. It usually does not replicate. C. It is present in the nucleus of the cell. D. It controls the synthesis of protein. |
12 |
| 1255 | Glucose is carbohydrate. A. True B. False |
12 |
| 1256 | Which of the following ratios does not change in DNA? A. Cytosine:Adenine B. Pyrimidine: Purine c. Adenine : Guanine D. Guanine: Deoxyribose E. Thymine : Guanine |
11 |
| 1257 | Give the structure of sucrose. | 12 |
| 1258 | 39. Assertion : Fructose is a reducing sugar. Reason: It has a ketonic group. (a) If both assertion and reason are true and reason is the correct explanation of assertion. (b) If both assertion and reason are true but reason is not the correct explanation of assertion. (c) If assertion is true but reason is false. (d) If both assertion and reason are false. (AIIMS) |
11 |
| 1259 | Choose the correct answer from the alternatives given Phosphorus is a structural element in: A. nucleic acids B. carbohydrates c. proteins D. lipids |
11 |
| 1260 | Which of the following varies from species to species? ( A cdot A=T ) ( B cdot C=G ) c. ( A+G=C+T ) D. AT/GC ratio |
12 |
| 1261 | 111. A tripeptide is written as Glycine-Alanine Glycine The correct structure of the tripeptide is CH (a) NHZY (NHCOOH CH3 CH3 NI CH COOH (b) NHZ CÁNH (c) NH, -NHA-COOH CHZ O (d) NHZ NH COOH AND IC |
11 |
| 1262 | In the nucleic acids, the phosphate ions are bonded with sugar at: A. 5,3 locations B. 5, 2 locations c. 3,1 locations D. 5, 1 locations |
12 |
| 1263 | Codon is present in: A . t-RNA B. m-RNA c. fats D. r-RNA |
12 |
| 1264 | Which one is not a cofactor? A . Co-enzyme B. Apoenzyme c. Prosthetic group D. Metal ions |
11 |
| 1265 | Match the compounds and their chemical units. Compound Units A. ( quad ) p. Unbranched polymer of glucose Amylopectin B. Lignin ( quad ) q. Branched polymer of glucose Complex polymer of aromatic C. Chitin ( quad ) alcohols D. Proteins ( quad ) s. Polymer of acetyl glucosamine t. Polymer of amino acids ( A cdot A-p, B-r, C-s, D-t ) B. ( A-q, B-r, C-s, D-t ) c. ( A-q, B-p, C-s, D-t ) ( D cdot A-p, B-r, C-p, D-t ) |
11 |
| 1266 | Thiamine is a: A. pyrimidine B. purine C. carbohydrate D. vitamin ( left(B_{1}right) ) |
12 |
| 1267 | If in a nucleic acid there are more than 8000 nucleotides it is most likely A. RNA B. DNA c. Both A and B D. None of the above |
11 |
| 1268 | RNA synthesis is controlled by A. Rho factor B. Sigma factor c. Endonuclease D. RNA polymerase |
11 |
| 1269 | Question 8. Can enzyme be called a polymer? un of proteins which T |
12 |
| 1270 | Nucleic acids are A. small molecules B. polymeric in nature C. the compounds of ( mathrm{C} ), H and 0 D. essentially proteins |
12 |
| 1271 | Structure of a disaccharide formed by glucose and fructose is given above Identify anomeric carbon atoms in monosaccharides units A. ‘a’ carbon of glucose and ‘a’ carbon of fructose B. ‘a’ carbon of glucose and ‘e’ carbon of fructose c. ‘a’ carbon of glucose and ‘b’ carbon of fructose D. ‘f’ carbon of glucose and ‘f’ carbon of fructose |
12 |
| 1272 | The inhibition of glutamic dehydrogenase by ATP during cellular respiration is an example of A. Feed back inhibition B. Competitive inhibition c. Allosteric inhibition D. Both A and B |
11 |
| 1273 | The chemical formula of starch is A ( cdotleft(C_{6} H_{10} O_{5}right)_{n} ) в. ( left(C_{6} H_{12} O_{6}right)_{n} ) c. ( C_{12} H_{22} O_{11} ) D. ( C H_{3} ) СООН |
11 |
| 1274 | Coenzymes NAD and NADP contain the vitamins A. Niacin B. Biotin c. Thiamine D. Vitamin ( B_{12} ) |
11 |
| 1275 | In which of the following form is the food stored in animal body? A. Glucose B. Glycogen c. Cellulose D. ATP |
11 |
| 1276 | Select the incorrect statement. A. Ribozymes are nucleic acids with catalytic power. B. Nucleic acids serve as genetic material. C. Proteins, nucleic acids and polysaccharides are the only three types of macromolecules found in the living system. D. Collagen is the most abundant protein in the whole of the biosphere and RuBisCo is the most abundant protein in animal world. |
11 |
| 1277 | Pick out the wrong statement. A. Amino acids are substituted methanes. B. Is a trihydroxy propane. C. Lysine is a neutral amino acid. D. Lecithin is a phospholipid. E. Adenosine is a nucleoside. |
11 |
| 1278 | What do you understand by denaturation of Protein? | 12 |
| 1279 | ( alpha-D- ) fructofuranose is a aldopentose A. True B. False |
12 |
| 1280 | The enzyme which has EC number 4.2.1.7 is assigned to which of the following classes of enzyme? A. Hydrolases B. Lyases c. Isomerases D. Ligases |
11 |
| 1281 | 2012 85. Secondary structure of protein refers to (a) mainly denatured proteins and structure of prosthetic groups three-dimensional structure, especially the bond between amino acid residues that are distant from each other in the polypeptide chain linear sequence of amino acid residues in the polypeptide chain regular folding patterns of continuous portions of the polypeptide chain. (BHU) |
11 |
| 1282 | Pyrimidines of RNA are A. Adenine and thymine B. Uracil and thymine C . Cytosine and uracil D. Cytosine and thymine |
11 |
| 1283 | To which chemical group do all enzymes belong? | 11 |
| 1284 | (a) What is fermentation? Give one example. (b) Write the balanced chemical equations of the reactions taking place in the manufacture of ethyl alcohol from sugar. |
12 |
| 1285 | Acid hydrolysis of sucrose is accompanied by a change in optical rotation. A. True B. False |
12 |
| 1286 | toppr ( E ) Q Type your question ( B ) ( c ) ( D ) |
12 |
| 1287 | 136. Tick the statement which is not true about nucleic acids. (a) The hydrolysis of DNA produces B-D- 2-deoxyribose. (b) The hydrolysis of RNA produces thymine. (c) The molecular mass of a nucleotide is greater than a nucleoside. (d) Nucleotides are joined together by phosphodiester linkage to form dinucleotide. (AMU (Med.)) |
11 |
| 1288 | 2016 2. The correct corresponding order of names of four aldoses with configuration given below CHO CHO CHO H-OH HOH НО-НН H-OHH OH HO+H CH2OH CH2OH CH OH CHO H-OH HOA-H CH2OH respectively, is (a) L-erythrose, L-threose, L-erythrose, D-threose (b) D-threose, D-erythrose, L-threose, L-erythrose (c) L-erythrose, L-threose, D-erythrose, D-threose (d) D-erythrose, D-threose, L-erythrose, L-threose. |
11 |
| 1289 | Q. 16 Which of the following reactions of glu he following reactions of glucose can be explained only by its cyclic structure? (a) Glucose forms pentaacetate (b) Glucose reacts with hydroxylamine to form an oxime (c) Pentaacetate of glucose does not react with hydroxyl amine (d) Glucose is oxidised by nitric acid to gluconic acid aminohowing absence of free |
11 |
| 1290 | In an electric field, if an amino acid migrate towards cathode, the pH of solution is said to be A. Less than PI B. More than Pl c. Equal to PI D. |
12 |
| 1291 | Riboflavin vitamin is: ( A cdot B_{1} ) ( B cdot B_{2} ) ( c cdot B_{12} ) D. B ( _{6} ) |
12 |
| 1292 | In zwitter ionic form, amino acids show behaviour: A . acidic B. basic c. neutral D. amphoteric |
12 |
| 1293 | 0.5 Proteins are found to ha a-helix and B-pleate stabilised by are found to have two different types of secondary structures viz and B-pleated sheet structure. a-helix structure of protein is (a) peptide bonds (C) hydrogen bonds (b) van der Waals, forces (d) dipole-dipole interactions |
12 |
| 1294 | The source of retinol (vitamin A) is: A . liver B. kidney C. fish oils D. all the above |
12 |
| 1295 | In which one of the following enzymes, is copper necessarily associated as an activator? A. Lactic dehydrogenase B. Tyrosinase c. carbonic anhydrase D. Trytophanase |
11 |
| 1296 | Which one of them catalyzes oxidation- reduction reactions? A. Oxidase B. Oxidoreductase c. oxygenase D. All of the above |
11 |
| 1297 | What is true about the given carbohydrate? A. It anomerizes in solution phase B. It is a reducing sugar C. It shows the phenomenon of inversion of sugar in acidic medium D. It shows mutarotation |
12 |
| 1298 | Which of the following hormones helps in the conversion of glucose into glycogen in the body? A. Insulin B. Cortisone c. Thyroxin D. Oxytocin |
12 |
| 1299 | Assertion Cellulose is not digested by human beings Reason Cellulose is a polymer of ( beta ) -D-glucose A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion c. Assertion is correct but Reason is incorrect D. Assertion is incorrect but Reason is correct |
12 |
| 1300 | The tripeptide hormone present in most living cells is: A . Glutathione B. Glutamine c. oxytocin D. Ptyalin |
12 |
| 1301 | The sex hormone, which controls the development and maintenance of pregnancy, is: A . cortisone B. thyroxine c. progesterone D. estrone |
12 |
| 1302 | The functional group which is found in amino acid is A. СООН в. ( N H_{3} ) c. ( C H_{3} ) ( D cdot operatorname{both} A & B ) |
12 |
| 1303 | Cellobiose, the hydrolytic breakdown product of cellulose is A. A monosaccharide B. A disaccharide c. A tetrasaccharide D. A trisaccharide |
11 |
| 1304 | Vegetable oils like wheat germ oil, sunflower oil, etc. are the good source of ? ( A ). vitamin ( K ) B. vitamin E c. vitamin D D. vitamin A |
12 |
| 1305 | A disaccharide which gives only glucose on hydrolysis is : A. lactose B. fructose c. sucrose D. maltose |
12 |
| 1306 | 89. Assertion : B-pleated sheet structure of protein shows maximum extension. Reason : Intermolecular hydrogen bonding is present in them. (a) If both assertion and reason are true and reason is the correct explanation of assertion. (b) If both assertion and reason are true but reason is not the correct explanation of assertion. (c) If assertion is true but reason is false. (d) If both assertion and reason are false. (AIIMS) |
11 |
| 1307 | If the sequence of bases in one strand of DNA is ATGACTGTC then the sequence of bases in its complementary strands is: в. тบстяบссия c. GUAGTUAUG D. None of the above |
12 |
| 1308 | Which of the following statements correctly completes the statement? Except for glycine, which is achiral, all the amino acids present in proteins A. are chiral but racemic B. have the ( L ) configuration at their ( alpha ) carbon c. have the ( R ) configuration at their ( alpha ) carbon D. have the ( S ) configuration at their ( alpha ) carbon |
12 |
| 1309 | The purine ( & ) pyrimidine pairs of complementry strands of DNA are held together by A. H bonds B. O bonds c. c bonds D. N bonds |
11 |
| 1310 | The nucleic acid base having two possible binding sites is: A. thymine B. cytosine c. guanine D. adenine |
12 |
| 1311 | 98. Secondary structure of protein is mainly governed by (a) hydrogen bonds (b) covalent bonds (c) ionic bonds (d) disulphide bonds (e) dative bonds. (Kerala PMT) |
11 |
| 1312 | Which of the following vitamins are water soluble? This question has multiple correct options ( A cdot A ) B. ( c cdot B ) D. |
12 |
| 1313 | Match the compounds in column I with their characteristic(s)/test(s)/reaction(s)/re agent(s)/stereochemistry/isomer(s) given in column II. Matching can be one or more than one. |
12 |
| 1314 | All the statements about temperature effects is true, with an exception of A. Raising the temperature may reduce the activity of an enzyme. B. Raising the temperature may increase the activity of an enzyme to some extent C. Raising the temperature may denature an enzyme. D. The isozymes of an enzyme have the same optimal temperature. |
11 |
| 1315 | BHNS is abbreviation of : A. Banaras Natural History Society. B. Bombay Natural History Society C. Botanical North Himalayan Survey. D. Biological Natural History Society. |
12 |
| 1316 | Number of hydrogen bonds between adenine and cytosine is: A. 0 B. ( c cdot 2 ) ( D ) |
12 |
| 1317 | Assertion A solution of sucrose in water is dextrorotatory but on hydrolysis in the presence of ( boldsymbol{H} oplus ),it becomes leavorotatory. Reason Inversion of sugar follows first order kinetics. A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion C. Assertion is correct but Reason is incorrect D. Both Assertion and Reason are incorrect |
12 |
| 1318 | A high fever is dangerous to human body because it A. Denatures enzymes B. Inactivates enzymes c. coagulates blood D. Boils fluids inside body |
11 |
| 1319 | . 43 Why does compound (A) given below not form an oxime? a AcOH – H |_OẠC Aco OH O H OAC H- CH2OAC (A) |
12 |
| 1320 | Answer in one word: Which hormone regulates the sugar level in the blood? |
12 |
| 1321 | The general molecular formula for disaccharide is: A. ( C_{12} H_{22} O_{11} ) B. ( C_{10} H_{20} O_{10} ) c. ( C_{12} H_{20} O_{10} ) D. ( C_{12} H_{22} O_{10} ) |
12 |
| 1322 | Write the structure of Leucine. | 12 |
| 1323 | Riboflavin is the chemical name of: A . Vitamin ( B_{1} ) B. Vitamin ( B_{2} ) C. Vitamin ( B_{6} ) D. Vitamin B complex |
12 |
| 1324 | What are intrinsic proteins? | 12 |
| 1325 | Question 12. Which moieties of nucleosides are involved in the formation of phosphodiester linkages present in dinucleotides? What does the word diester in the name of linkage indicate? Which acid is involved in the formation of this linkage? |
12 |
| 1326 | Progesterone is secreted by: A. Thyroid B. ovaries c. Adrenal D. Testes |
12 |
| 1327 | Write a short note on heterocyclic base present in nucleic acids. (structure is not required) |
12 |
| 1328 | GH promotes: A. bone growth B. cell division C . protein synthesis D. all of the above |
12 |
| 1329 | Combination of proteins with nucleic acids give A. enzymes B. polypeptides c. nucleo proteins D. dipeptides |
12 |
| 1330 | Molisch reagent is used to identify following compound? A. Glucose B. Raffinose c. D-oxribose D. All of these |
12 |
| 1331 | D-glucose ( & ) D-fructose can be differentiated by: A. Fehling solution B. Tollens reagent c. Benedict test D. ( B r_{2} / H_{2} O ) |
12 |
| 1332 | Name the compound that does not fit into the formula ( C_{x}left(H_{2} Oright)_{Y} ) but is a carbohydrate. |
12 |
| 1333 | Q. 28 Which of the following terms are correct a (a) Proteins (b) Dinucleotides (c) Nucleic acids (d) Biocatalysts |
11 |
| 1334 | Write two main functions of carbohydrates in plants. |
12 |
| 1335 | Fructose gives negative silver mirror test with ammoniacal silver nitrate A. True B. False |
12 |
| 1336 | Mark the wrong statement A. Zinc is a cofactor for proteolytic enzyme carboxypeptidase B. ( K_{m} ) (Michaelis Constant) is numerically equivalent to ( 1 / 2 mathrm{Vmax} ) C. Strands of DNA appear like a helical staircase. At each step of ascent, strand turns ( 36^{circ} ) D. Tyrosine, Phenylalanine and Tryptophan are aromatic amino acids |
11 |
| 1337 | Two monomers in maltose are: A. ( alpha-D- ) glucose and ( alpha-D- ) Fructose B. ( alpha-D- ) glucose and ( alpha-D- ) galactose C ( . alpha-D- ) glucose and ( alpha-D- ) glucose D. ( alpha-D- ) glucose and ( beta-D- ) glucose |
12 |
| 1338 | toppr Q Type your question B. ( c ) ( D ) |
12 |
| 1339 | Why are vitamin A and vitamin C essential to us? Give their important sources. |
12 |
| 1340 | The hormone which controls the contraction of uterus after child birth and also produces lactation in the mammary glands is: A . Insulin B. Oxytocin c. Estrone D. Estradiol |
12 |
| 1341 | The polyhydroxy aldehydes are called: A. proteins B. fats c. carbohydrates D. vitamins |
12 |
| 1342 | Write a short note on starch: | 12 |
| 1343 | Give the composition and functions of CSF. |
12 |
| 1344 | Dextrin is a A. Polymer of glucose B. Plasma expander C. Use in dehydration condition D. Both A and C |
11 |
| 1345 | Q. 12 DNA and RNA contain four bases each. Which of the following bases in not present in RNA? (a) Adenine (b) Uracil (c) Thymine (d) Cytosine ns al DNA |
11 |
| 1346 | Q. 16 Which of the following reactions of glucose can be explained only by its cyclic structure? (a) Glucose forms pentaacetate (b) Glucose reacts with hydroxylamine to form an oxime (c) Pentaacetate of glucose does not react with hydroxyl amine (d) Glucose is oxidised by nitric acid to gluconic acid |
12 |
| 1347 | Give two differences between D.N.A. and R.N.A. |
12 |
| 1348 | Hydrolysis of sucrose with dilute aqueous sulphuric acid yields: ( mathbf{A} cdot 1: 1 ) of ( D-(+)- ) glucose ( ; D-(-)- ) fructose B. 1: 2 of ( D-(+)- ) glucose; ( D-(-)- ) fructose ( mathbf{c} cdot 1: 1 ) of ( D-(-)- ) glucose ( ; L-(+)- ) fructose D. 1: 2 of ( D-(-)- ) glucose; ( D-(+)- ) fructose |
12 |
| 1349 | Give an example of fibrous and globular protein. |
12 |
| 1350 | Assertion Enzymes lower down the activation energy of the reactant molecule to make its transition into product easier Reason Enzymes are highly substrate specific catalysts. |
11 |
| 1351 | Q. 23 Amino acids are classified as acidic, basic or neutral depe relative number of amino and carboxyl groups in the f amino and carboxyl groups in their molecule. Which of the following are acidic? (a) (CH3),CH-CH-COOH NH2 (b) HOOC–CH2–CH2–CH –COOH NH, os usuels (c) HN— CH, CH, CH, –COOHOO P (d) HOOC–CH2– CH –COOH. NH, |
12 |
| 1352 | 37. The compounds leading to ori- gin of life were: (1) Urea and nucleic acids (2) Amino acids and urea (3) Proteins and nucleic acid (4) Protein and amino acids |
12 |
| 1353 | Table sugar (Sucrose) is a: A. disaccharide of ( alpha ) -D Glucose and ( beta ) -D Fructose B. monosaccharide C . disaccharide containing two glucose units D. polysaccharide |
12 |
| 1354 | 103. There are 20 naturally occurring amino acids. The maximum number of tripeptides that can be obtained is (a) 6470 (b) 7465 (c) 5360 (d) 8000 |
11 |
| 1355 | Which of the following is not present in genetic material? A. Cytosine B. Thymine c. Arginine D. Guanine E. Uracil |
11 |
| 1356 | Relation between amino acids and proteins is similar to the one present between A. nucleotides and nucleic acids B. RNA and DNA c. glucose and fructose D. all of the above |
12 |
| 1357 | 91. Biuret test is not given by (a) proteins (c) polypeptides (b) carbohydrates (d) urea. (AFA |
11 |
| 1358 | In the figure below, the plane drawn behind the peptide bond indicates the: A. absence of rotation around ( C-N ) bond because of its partial-double bond character B. plane of rotation around the ( C-N ) bond c. region of steric hindrance determined by the large ( C=O ) group D. none of the above |
12 |
| 1359 | The two functional groups present in a typical carbohydrate are: A. ( -O H ) and ( -C O O H ) B. ( -C H O ) and ( -C O O H ) ( mathrm{c} .>C=O ) and ( -O H ) D. ( -O H ) and ( -C H O ) |
12 |
| 1360 | A five carbon sugar with molecular formula ( C_{5} H_{10} O_{4} ) A. Deoxyribose B. Ribose c. Glucose D. Lactose |
11 |
| 1361 | Explain the process of formation of complex protein? | 11 |
| 1362 | Lactic acid is called so because it is obtained from sour milk. A. True B. False |
12 |
| 1363 | The secondary structure of protein which exists in hair is |
12 |
| 1364 | The pentose sugar present in genetic material of polio virus is A. Ribose B. Deoxyribose c. sucrose D. Fructose |
11 |
| 1365 | Incorrect statement about given carbohydrate is A. Above compound is a reducing sugar B. Above compound undergo mutaritation C. Above compound is a non-reducing sugar D. Above compound has a glycosidic linkage |
12 |
| 1366 | Which of the following constitutes the genetic material of the cell? A. Nucleic acids B. proteins c. lipids D. carbohydrates |
12 |
| 1367 | RNA is not found in A . Cytoplasm B. Nucleus c. cell sap D. All of the above |
11 |
| 1368 | Which vitamin is not obtained from plants? A. Cyanocobalamine B. Thiamine c. Pyridoxine D. ( alpha ) – tocopherol |
12 |
| 1369 | 92. Which of the following amino acid do not have primary amino functional group? (a) Alanine (b) Isoleucine (c) Leucine (d) Proline |
11 |
| 1370 | Ribose sugar is not a component of A. AMP в. Атр c. DNA D. RNA |
11 |
| 1371 | Match the following. SET A SET B Name of hormone Functional group in hormones 1) Testosterone a) double bond 2) Estradiol b) Ketone 3) Progesterone c) Alcohols 4) Ethylene d) Alcohol and ketone A ( cdot 1-d ; 2-c ; 3-b ; 4-a ) B. ( 1-a ; 2-b ; 3-c ; 4-d ) ( c cdot 1-c ; 2-d ; 3-a ; 4-b ) D. ( 1-b ; 2-c: 3-d: 4-c ) |
12 |
| 1372 | Androgens are A. female sex hormone B. non steriod C . plant hormone D. male sex hormones |
12 |
| 1373 | 48. Fructose reduces Tollens’ reagent due to (a) asymmetric carbons (b) primary alcoholic group (C) secondary alcoholic group (d) enolisation of fructose followed by conversion to aldehyde by base. (AIPMI a |
11 |
| 1374 | The correct statement in respect of protein haemoglobin is that it: A. functions as a catalyst for biological reactions B. maintains blood sugar level C . acts as an oxygen carrier in the blood D. forms antibodies and offers resistance to diseases |
12 |
| 1375 | Q. 37 Which sugar is called invert sugar? Why is it called so? die in doytrortato al |
11 |
| 1376 | An organic compound answers Molisch’s test as well as Benedict’s test. But it does not answer Scliwanoff’s test. Most probably, it is : A. sucrose B. Protein c. Fructose D. Maltose |
12 |
| 1377 | Q.30 How do you explain the presence of all the six carbon atoms in glucose in a straight chain? |
12 |
| 1378 | What type of polymer is a protein? A. Structure B. Mode of Polymerization c. Molecular forces D. None |
12 |
| 1379 | The compound which does not show simple ratio of atoms, is |
12 |
| 1380 | Which statements are correct about the figure given below? This question has multiple correct options A. It is sucrose B. Due to presence of hemi-acetal linkage, it is a non educing sugar c. Left side unit is ( alpha ) -D-Glucose and right side unit is ( beta-D ) ructose D. Due to absence of hemi-acetal linkage, it can’t show mutarotation |
12 |
| 1381 | Which of the following statements is/are incorrect? . Amylose does not give blue colour with ( I_{2} ) solution. II. Amylopectin gives blue colour with ( I_{2} ) solution. III. Amylum is present in wheat, maize, rice, potatoes, barley, sorghum etc. IV. Amylose is linear polymer of ( D ) glucose units. A. I and II only B. III and IV only c. I and III only D. II and III only |
12 |
| 1382 | Which of the following is wrong about the carbohydrate? A. Starch is a carbohydrate B. Carbohydrates are produced in photosynthesis c. cellulose is not a carbohydrate D. Carbohydrates are also called as saccharides |
12 |
| 1383 | The hormone used as an oral contraceptive is: A. Aldosterone B. Cortisone c. Progesterone D. Testosterone |
12 |
| 1384 | Two isomer products are obtained in (C). They are: A. both ( gamma ) -lactone B. both ( delta ) -lactones C. one is ( gamma ) -lactone and another is ( delta ) -lactone D. none |
12 |
| 1385 | Which of the following test is performed by carbohydrates? A. Biuret test B. Nitroprusside test c. Ninhydrin test D. Molisch’s test |
12 |
| 1386 | Assertion Sucrose is a reducing sugar and exhibits mutarotation. Reason Sucrose is a disaccharide consisting of glucose and fructose units. A. Statements A and R are true and ( mathrm{R} ) is the correct explanation of ( A ) B. Statements A and R are true and R is not the correct explanation of ( A ) C. Statements A is true and R is false. D. Statements A is false and R is true. |
12 |
| 1387 | Vitamin E is also called: A. Cyanocobalamin B. Tocopherol c. Lactoflavin D. Ascorbic acid |
12 |
| 1388 | DNA strands are anti-parallel because of A. H bonds B. Phosphate diester bonds c. Disulphide bonds D. Phosphate bonds |
11 |
| 1389 | Cellulose is a polymer of : A. Glucose B. Fructose c. Ribose D. sucrose |
12 |
| 1390 | TIIUL Q.50 How do you explain the presence of an aldehydic group in a glucose molecule? |
12 |
| 1391 | The most resistant organic substance which can withstand environmental extremes and cannot be degraded by any enzyme is A . Lignin B. Suberin c. cutin D. sporopollenin |
11 |
| 1392 | 1 102. Assertion : Millon’s test is a test for identification of proteins. Reason : Millon’s reagent is a solution of mercurous nitrate and mercuric nitrate in nitric acid containing little nitrous acid. (a) If both assertion and reason are true and reason is the correct explanation of assertion. If both assertion and reason are true but reason is not the correct explanation of assertion. (c) If assertion is true but reason is false. (d) If both assertion and reason are false. (AIIMS) • 1 T . |
11 |
| 1393 | The inhibitory effect of malonic acid on succinic dehydrogenase enzyme is A. Competitive inhibition B. Non-competitive inhibition c. Feedback inhibition D. Inhibition due to end product |
11 |
| 1394 | The fastest acting enzyme in the biological kingdom is A. Lipase B. Amylase c. carboxypeptidase D. Carbonic anhydrase |
11 |
| 1395 | Preparation of soyabean milk and its comparison with the natural milk. | 12 |
| 1396 | Assertion ( D-2- ) Deoxyglucose reacts with 3 ( operatorname{mol} P h N H N H_{2} ) and forms an osazone. Reason ( D-2- ) Deoxyglucose has no ( (C- ) ( O H) ) group ( alpha ) – to the ( (C=O) ) group A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion c. Assertion is correct but Reason is incorrect D. Both Assertion and Reason are incorrect |
12 |
| 1397 | Proteins are: A. Polyamides B. Polyesters C . Polyhydric alcohols D. Polycarboxylic acids |
12 |
| 1398 | Sugars are seperated by using the solvent BAW (n-butanol acetic acid ( left.-H_{2} Oright) ) and detected by spraying the plate with: A. Aniline hydrogen phthalate solution B. Hydrogen peroxide solution C. crystals of ( I_{2} ) D. cupric oxide |
12 |
| 1399 | The number of peptide bonds in the compound is : ( A ) B. ( c ) ( D ) |
12 |
| 1400 | What is a peptide bond? | 12 |
| 1401 | Solve the following. It is known that 5 microgram of an enzyme convert 10 million molecules of substrate to end products per second. To calculate the enzyme’s turnover what else must be known? A. Molecular weight of the enzyme. B. Molecular weight of the enzyme and substrate both. c. The molecular weight of substrate only. D. Molecular weight of end product only |
11 |
| 1402 | 46. Sucrose on hydrolysis gives (a) glucose and fructose (b) galactose and glucose (c) galactose and maltose (d) none of the above. |
11 |
| 1403 | An amino acid may be represented by general formula ( boldsymbol{H}_{2} boldsymbol{N}-boldsymbol{C} boldsymbol{H}-boldsymbol{R}- ) COOH. If ( boldsymbol{R}=-boldsymbol{C} boldsymbol{H}_{2} boldsymbol{C}_{6} boldsymbol{H}_{5} ) then it is phenylananine (Phe) and if ( boldsymbol{R}=boldsymbol{C H}_{3} ) then it is alanine (Ala). Find the sequence of reagents from those given below to synthesize Phe-Ala. ( mathrm{cH}_{3} ) (1) ( mathrm{zNH}_{mathrm{G}}^{mathrm{HCO}_{3} mathrm{H}} ) ( mathrm{cH}_{2} mathrm{G}_{5} ) (2) (з) ZNHCнсО ( _{2} ) Н (4) ( mathrm{H}_{2} mathrm{NCH} mathrm{CO}_{2} mathrm{CH}_{2} mathrm{C}_{6} mathrm{H}_{5} ) A. 1 and 2 B. 1 and 4 ( c cdot 2 ) and 3 D. 3 and 4 |
12 |
| 1404 | 145. Which one is not a constituent of nucleic acid (a) Uracil (b) Guanidine (c) Phosphoric acid (d) Ribose sugar (WE |
11 |
| 1405 | Enzyme catalysis is an example of: A . autocatalysis B. heterogeneous catalysis c. homogeneous catalysis D. induced catalysis |
11 |
| 1406 | Consider the given statements: I. Maltose is also known as malt sugar. II. Sucrose is also known as cane sugar. III. Lactose is also known as grape sugar. IV. Starch is also known as amylum. The correct statement(s) is/are: ( A cdot ) ।, ॥ and IV B. I, II and III c. ॥, ॥ा and IV D. All |
12 |
| 1407 | Structurally, cellulose is a linear polymer of : A. ( beta ) -D-glucose units B. sucrose molecules c. ( alpha ) -D-glucose units D. glucose and fructose units |
12 |
| 1408 | 66. The amino acid which is basic in mature is (a) histidine C) proline |
11 |
| 1409 | In double strand helix structure of DNA, heterocyclic base cytosine forms hydrogen bond with: A. adenine B. guanine c. purine D. thymine E. uraci |
12 |
| 1410 | How may H-bonds are formed between the two strands of dsDNA of ( 170 A^{circ} ) length if the cytosine is ( 20 % ? ) |
11 |
| 1411 | Which among the following is an inorganic compound? A. Protein B. Marble c. waxes D. Sugar |
12 |
| 1412 | 23. Ribose and 2-deoxyribose can be differentiated by (a) Fehling’s reagent (b) Tollens’ reagent (c) Barfoed’s reagent (d) Osazone formation. |
11 |
| 1413 | What type of fibre is cotton? A . Acid B. Base c. cellulose D. Bast |
12 |
| 1414 | As shown in the image, a series of enzymes catalyze the conversion of Molecule A to Molecule C. Molecule C functions as a co-repressor for the operon controlling production of Enzyme A. Which of the following scenarios would most likely result from the introduction of a large amount of Molecule C? A. concentration of Enzyme A will decrease. B. Concentration of Molecule A will decrease c. concentration of Molecule B will increase D. concentration of Enzyme B will increase. |
11 |
| 1415 | The bases that are common in both RNA and DNA are: A. adenine, guanine, thymine B. adenine, uraci, cytosine c. adenine, guanine, cytosine D. guanine, uracil, thymine |
12 |
| 1416 | What are tetrasaccharides? Give its general formula and an example. |
12 |
| 1417 | a helix 0. 6 In disaccharides, if the reducing groups of monosaccharides, 1.e.. aldehydic or ketonic groups are bonded, these are non-reducing sugars. Which of the following disaccharide is a non-reducing sugar? CHOH CHOH но Hни оu (а) AO TH / Н ТН HA OH Y I tot C HOV он на N И ОН / OH нон нон СН2ОН нон НОНС (b) Ин ОН НА HOV н /CH₂OH нон ОН н CHOH CHOH но но — о он окон нд н VH VH – О, (c) КОН НА нон CHOH НОН СН2ОН НО – оо (d) VH но оu бет б-І ЛОН НИ HO V VH ЛОН НИ VH НОН нон |
12 |
| 1418 | Explain the classification of hormones in detail. | 12 |
| 1419 | 101. In haemoglobin the metal ion present is (a) Fe3+ (b) Zn2+ (c) Co2+ (d) Cu2+ |
11 |
| 1420 | Cane sugar on hydrolysis gives: A. glucose only B. glucose and maltose C . glucose and fructose D. glucose and lactose |
12 |
| 1421 | Enzymes are also called biocatalyst? A. True B. False |
11 |
| 1422 | The element present in traces in insulin is: A. Iron B. cobalt c. zinc D. Magnesium |
12 |
| 1423 | Which of the following factor does not affect an enzyme’s activity? A. pH levels B. Inhibitors c. Temperature D. Enzyme cofactors E. Enzyme concentration |
11 |
| 1424 | The transmission of genes, from one generation to next in case of eukaryotic protein sequences takes place through A. Other proteins B. rRNA ( c cdot operatorname{tRNA} ) D. mRNA E. DNA |
11 |
| 1425 | Which of the following is synthetic sweetener? A. Saccharin B. Aspartame c. Dulcin D. All of the above |
12 |
| 1426 | Which of the following is true regarding monosaccharides? A. Always have six carbon atoms B. Always have five carbon atoms c. Always have four carbon atoms D. May contain 3 to 7 carbon atoms |
12 |
| 1427 | Question 21. What are nucleic acids? Mention their two important functions. I. biomolecules which are found in the |
11 |
| 1428 | How many kinds of ( mathrm{N}_{2} ) bases in nucleic acids are? A. Three B. Four c. Five D. Eight |
11 |
| 1429 | Assertion Carbohydrates are most suitable for the production of energy in the body than protein and fats. Reason Carbohydrates can be stored in the tissues as glycogen and can be used for production of energy whenever necessary. A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion C. Assertion is correct but Reason is incorrect D. Both Assertion and Reason are incorrect |
11 |
| 1430 | One mole of stachyose on hydrolysis yields: A. 1 mole of glucose +1 mole of fructose +2 mole of galactose B. 2 mole of glucose +1 mole of fructose +1 mole of galactose C. 1 mole of glucose +2 mole of fructose +1 mole of galactose D. 2 mole of glucose +2 mole of fructose |
12 |
| 1431 | Among Valine, Leucine, Isoleucine, Lysine and Phenyl alanine, odd member is: A. Leucine, since others are acidic B. Valine, since others are basic c. Isoleucine, since others are optically active D. Leucine, since others are neutral |
12 |
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