We provide photosynthesis in higher plants practice exercises, instructions, and a learning material that allows learners to study outside of the classroom. We focus on photosynthesis in higher plants skills mastery so, below you will get all questions that are also asking in the competition exam beside that classroom.
List of photosynthesis in higher plants Questions
| Question No | Questions | Class |
|---|---|---|
| 1 | ( N A D^{+} ) is reduced in photorespiration inside A. Mitochondria B. Mitochondria and peroxisome c. Mitochondria and chloroplasts D. chloroplasts and peroxisomes |
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| 2 | State Blackman’s Law of limiting factors. |
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| 3 | Name the following: A photosynthetic stage which may take place in the presence and absence of light. |
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| 4 | Melvin Calvin recieved nobel prize for A. Botany B. Plant Physiology c. Biochemistry D. Chemistry |
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| 5 | 40. The process through which excess of light energy is dissipated in photosynthesis is known as (1) Quenching (2) Scavenging (3) Photolysis (4) Photophosphorylation |
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| 6 | Plants which exhibit photorespiration are ( mathbf{A} cdot C_{4} ) plants B. ( C_{3} ) plants c. cam plants D. Alpine plants |
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| 7 | Peroxisome is associated with. A. Photorespiration. B. Photosynthesis. c. Photoperiodism. D. Phototropism. |
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| 8 | Glycolate metabolism occurs in A. Lysosome B. Ribosomes c. Glyoxysomes D. Peroxisome |
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| 9 | Which of the following would happen if the supply of ( O_{2} ) is decreased to an ¡Illuminated wheat plant? A. Its photosynthesis would decrease. B. Its respiration would increase. C. Its photosynthesis would increase D. All the physiological process would stop. |
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| 10 | Hill reaction occurs in A. High altitude plants B. Total darkness C. Absence of water D. Presence of ferricyanide |
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| 11 | Which compound is four carbon compound in the ( C_{3} ) cycle? A. Erythrose – 4 – phosphate B. Dihydroxy acetone phosphate C. 3- Phosphoglyceraldehyde D. Oxalo acetic acid |
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| 12 | What do you mean by limiting factors? Explain effect of light on photosynthesis. Which hormone is named as hormone of flight and flight? |
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| 13 | The structure known as peroxisome is associated with A. Photosynthesis. B. Respiration. c. Photorespiration. D. Photophosphorylation. |
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| 14 | Chemosynthetic pathway of photosynthesis occur in :- A. cytosol B. Stroma c. Membrane of thylakoid D. Lumen |
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| 15 | Product (s) of ( Z- )scheme which is/are utilise in calvin cycle, is/are: A. only ( A T P ) B. ( A T P, N A D P H ) and ( O_{2} ) c. ( A T P ) and ( N A D P H ) D. only ( O_{2} ) |
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| 16 | Which of the following takes place during Calvin cycle? A. Photophosphorylation B. Replication c. Reduction and carboxylation D. None of the above |
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| 17 | Chemiosmotic theory of ATP synthesis in mitochondria is based on A ( cdot mathrm{K}^{+} ) gradient B. H ( ^{+} ) gradient c. Nat gradientt D. ( mathrm{ca}^{2+} ) gradient. |
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| 18 | The correct sequence of organelles in which glycolate and glyoxylate are produced sequentially in photorespiration is A. Chloroplast and mitochondria B. Chloroplast and peroxisome c. Peroxisome and mitochondria D. Peroxisome and chloroplast |
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| 19 | In non-cyclic photophosphorylation there is photolysis of 12 water molecules. How many ( boldsymbol{H}^{+} ) are formed? A ( .24 H^{+} ) B . 36 ( H^{+} ) c. ( 12 H^{+} ) D . 32 ( H^{+} ) |
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| 20 | Radioactive ( C^{14} ) is given to ( C 0_{2} ) and released to atmosphere. This ( C 0_{2} ) is taken by ribulose diphosphate in a ( C_{3} ) plant. First radioactive ( C^{14} ) is seen in which compound? A. PGAL B. PEP c. RMP D. PGAA |
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| 21 | Main factor which limits the rate of photosynthesis on a clear day is A. Chlorophyll B. Light ( c cdot C O_{2} ) D. water |
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| 22 | During photorespiration the oxygen consuming reaction occur in A. Grana of chloroplast and peroxisomes B. Stroma of chloroplasts c. Stroma of chloroplasts and mitochondria D. Stroma of chloroplasts and peroxisomes |
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| 23 | Chloroplasts without grana are known to occur in A. Bundle sheath cells of ( C_{3} ) plants B. Mesophyll cells of ( C_{4} ) plants C. Bundle sheath cells of ( C_{4} ) plants D. Mesophyll cells of all plants |
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| 24 | Define photo-oxidation and photorespiration. | 11 |
| 25 | What is photorespiration? Explain it with diagrammatic representation. | 11 |
| 26 | n the given figure, what are the substances labelled as ( P, Q, R ) and ( S ? ) A . P-PGA, Q-Glyoxylate, ( R-N H_{3} ), S-serine 3. P-Glycolate, Q-Glyoxylate, ( R-N H_{3} ), S-serin c. P-Glycolate, Q-Glyoxylate, ( R-C O_{2} ), S-serin ‘. P-RuBP, Q-Glycerate, ( R-C O_{2} ), S-Serine |
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| 27 | Choose the correct statement. A. Stroma lamella membrane lacks PS II and PS I. B. When PS I is functional, electron flow in a noncyclic way. C. ATPase enzyme consists of ( F_{0} ) and ( F_{1} ) units D. NADP reductase is a part of PS II. |
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| 28 | Which process is related with photosynthesis? A. Phosphorylation B. Translation c. Transcription D. None of the above |
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| 29 | Explain why respiration is said to be the reverse of photosynthesis. | 11 |
| 30 | Which one of the following is a wasteful process? A. Photorespiration B. Respiration c. Photosynthesis D. ETS |
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| 31 | Give an account of factors which affect photosynthesis. |
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| 32 | Which part of the photosynthetic process does not require light and temperature? A. Hill’s reaction B. Blackman’s reaction c. warburg’s reaction D. Emerson’s reaction |
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| 33 | Law of limiting factor is A. Law of maximum B. Law of minimum C. Law of optimum D. All of the above |
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| 34 | Which of the following is not a factor in determining rate of photosynthesis? A. ( mathrm{C}_{6} mathrm{H}_{12} mathrm{O}_{6} ) B. ( mathrm{cO}_{2} ) c. ATP D. Light |
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| 35 | Blackman’s law was conceived in connection with A. Photosynthesis B. Respiration c. Transpiration D. Root pressure. |
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| 36 | Why is photorespiration also called ( C_{2} ) cycle? |
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| 37 | Very short answer type. Explain ( C O_{2} ) compensation point |
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| 38 | If plant is first exposed to light of 730 nm wavelength and then to of ( 600 mathrm{nm} ) then plant will A. Show inhibited growth B. Resume normal growth c. will not grow D. Die immediately |
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| 39 | The law of limiting factor for photosynthesis was given by A . R. Hill B. Krebs c. Calvin D. Blackman |
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| 40 | The first scientist to find out the role of light in photosynthesis was A. Ingenhousz B. Senebier c. Priestley D. sachs |
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| 41 | Chemiosmotic hypothesis given by Peter Mitchell proposes the mechanism of A. Synthesis of ATP. B. synthesis of FADH c. synthesis of NADH. D. Synthesis of NADPH. |
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| 42 | The law of minimum was proposed by A. Priestly B. Liebig c. ні| D. Blackman |
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| 43 | Very short answer type. Give the exact location and function of grana |
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| 44 | At high temperatures, the enzymes of photosynthesis gets deactivated because A. They get denatured B. They are proteinous in nature c. They have optimum range of temperature at which they are functional D. All of the above |
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| 45 | Main factor which limits the rate of photosynthesis on a clear day is A. Chlorophyll. B. Light. c. ( C O_{2} ) D. water |
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| 46 | First acidic compound formed in ( C_{4} ) cycle is A. OAA B. Malic acid c. Pyuvic acid D. PGAA |
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| 47 | Assertion In ( C_{4} ) cycle, first stable product has 4 carbon compound Reason In ( C_{4} ) plants, ( C_{3} ) cycle is absent 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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| 48 | (a) Give a schematic outline of photorespiration. (b)Differentiate between photophosphorylation and photorespiration. |
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| 49 | Photorespiration takes place in which of the following organelles? A. Chloroplast and mitochondria B. Mitochondria and peroxisome c. Bundle sheath cells and chloroplasts D. chloroplast, peroxisome and mitochondria. |
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| 50 | Explain chemiosmotic hypothesis for ATP synthesis. | 11 |
| 51 | The father of ATP cycle is A. White B. Lipmann c. Pasteur D. Buchner |
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| 52 | Select the correct option: Identify ( A, B, C, D ) and ( E ) in the given flow chart showing Z-scheme of light reaction ( mathbf{A} cdot A-P_{700} ; mathrm{B}-H^{+} ) acceptor; ( mathrm{C}-e^{-} ) acceptor; ( mathrm{D}-P_{680} ; mathrm{E} ) ( N A D P^{+} ) B. A-Photo -system I ; B- ( e^{-} ) acceptor; C- ( e^{-} ) transport system; D-Photo system II; E- NADPH C. A-Photo-system II; B- ( H^{+} ) acceptor; ( mathrm{C}-e^{-} ) acceptor; ( mathrm{D} ) – ( P_{700} ; ) E- NADPH. D. A-Photo-system II; B- ( e^{-} ) acceptor; ( C-e^{-} ) transport system; D- photo-system I; E- NADPH. |
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| 53 | The function of ATP in photosynthesis is the transfer of energy from the A. Dark reaction to the light reaction B. Light reaction to the dark reaction c. chloroplasts to mitochondria D. Mitochondria to chloroplasts |
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| 54 | Ammonia is released by plants during ( A cdot C ) A ( M ) B. Dark respiration c. Photorespiration D. All of the above |
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| 55 | Who first indicated that water is electron donor in photosynthesis? A. Arnon B. Calvin c. Blakeslee D. Van Niel. |
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| 56 | Ratio between 2 -carbon and 3 -carbon intermediate having ( mathrm{NH}_{2} ) group formed in photosynthetic oxidation cycle is A. 2: B. 1: ( c cdot 3: 2 ) D. 3: 4 |
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| 57 | Number of cell organelles involved in photorespiration are A. one B. Two c. Three D. Four |
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| 58 | The principle of limiting factor was given by A. Hill B. F. F Blackman c. will statter D. Calvin |
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| 59 | The concentration of carbon dioxide beyond which it fails to accelerate the photosynthesis is known as A. Saturation point. B. Compensation point. c. Both A and B D. None of the above |
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| 60 | As a result of pyrolysis, which one of the following is produced A. Alcohol B. Charcoal c. charcoal and gas D. Charcoal, gas and oil |
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| 61 | Maize, Sugarcane and some other tropical plants have high efficiency of ( C O_{2} ) fixation because they operate A. Calvin cycle B. Hatch-Slack cycle c. TcA cycle D. PP pathway |
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| 62 | If light intensity increases the first limiting factor is ( A cdot C O_{2} ) B. Starch ( c cdot O_{2} ) ( D cdot s O_{2} ) |
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| 63 | Application based questions Suggest some habitats in which (a) light intensity or (b) temperature might be limiting factors in photosynthesis. |
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| 64 | Assertion Under conditions of high light intensity and limited ( C O_{2} ) supply, photorespiration has a useful role in protecting the plants from photooxidative damage. Reason If enough ( C O_{2} ) is not available to utilize light energy for carboxylation to proceed, the excess energy may not cause damage to plants. 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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| 65 | During photosynthesis A. Water is reduced and ( C O_{2} ) is oxidized. B. ( C O_{2} ) is reduced and water is oxidized. C ( . ) Both ( C O_{2} ) and water get reduced. D. Both ( C O_{2} ) and water get oxidized. |
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| 66 | The Blackman’s law of limiting factor is an elaboration of A. Liebig’s law of minimum. B. Hatch and Slack mechanism. c. sach’s cardinal points. D. None of the above |
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| 67 | Which of the option is correct for photorespiration? A. In peroxisome, glycerate forms phosphoglycolate B. In chloroplast, glycerate forms glycine C. In mitochondrion, glycine forms serine D. In bundle sheath, serine forms glycine. |
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| 68 | Which of the following are necessary for photosynthesis? A. Light and suitable temperature B. Chlorophyll and water c. Carbon dioxide D. All of the above |
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| 69 | If the rate of translocation of food is slow, what will be the effect on photosynthesis? A. It will increase B. It will remain same c. Become double D. It will decrease |
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| 70 | Why is photo respiration is considered as a destructive activity? | 11 |
| 71 | Amount of ( C O_{2} ) mixed annually is about A. ( 70 times 10^{10} mathrm{Kg} ) в. ( 70 times 10^{11} mathrm{Kg} ) c. ( 70 times 10^{13} mathrm{Kg} ) D. ( 70 times 10^{13} g ) |
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| 72 | In which form does the food get transported in plants? A. sucrose B. Fructose c. Glucose D. Lactose |
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| 73 | Which factor is not limiting in normal conditions for photosynthesis? A. Light intensity B. ( mathrm{cO}_{2} ) c. water D. chlorophyll |
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| 74 | fungal cell with different parts labelled as ( A, B, C ) and ( D . ) Which of the following statements are true with regard to the fungal cell structure? (i) A contains mucopolysaccharides which are also present in exoskeleton of insects and crustaceans. (ii) D are usually more than one in number in case of aseptate hyphae. (iii) Carotenes and xanthophylls are present in ( C, ) which harvest light energy for photosynthesis. (iv) ( mathrm{B} ) is the reserve food material, usually stored in the form of starch and oil. A. (i) and (ii) B. (iii) and (iv) C. (i), (ii) and (iv) D. (ii), (iii) and (iv) |
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| 75 | The reaction involved in reduction of ( N A D^{+} ) is A. Glucose- -> Glucose 6- – B. Fructose 1, 6- diphosphate>PGAL+DiBAP c. Glucose 6-P – ->Fructose 6 – – |
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| 76 | Study the graph which shows results of three different experiments ( P, Q ) and ( R ) Concentrate on graphs ( mathrm{P} ) and ( mathrm{Q} ) and answer the following questions? What is the difference between the Curves? A. The temperature has increased at B. The rate of photosynthesis increased faster in ( Q ) and in ( P ) C. The rate of photosynthesis lowered in ( Q ) and D. The temperature has lowered at ( Q ) |
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| 77 | ( C_{4} ) pathway of ( C O_{2} ) fixation was discovered by A. Blackman B. Hatch and Slack c. Emerson and Arnold D. Arnon |
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| 78 | Plant shows adaptations to hot and dry climates is I. CAM II. Mycorrhizae III. ( C_{4} ) photosynthesis A. I only B. II only c. I and ॥ D. I and III E . ।, ॥।, and III |
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| 79 | Of the total incident solar radiation the proportion of PAR is A. More than ( 80 % ) B. About 70% c. About 60 % D. Less than 50 % |
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| 80 | Dark reaction of photosynthesis is called so, because A. It can also occurin dark B. It does not require light. c. cannot occur during day time D. It occurs more rapidly in night |
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| 81 | How many molecules of water are needed by a green plant to produce one molecule of hexose/reduce 6 molecules of ( C O_{2} ? ) ( A cdot 6 ) B. 12 ( c cdot 24 ) ( D ) |
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| 82 | In which one of the following do the two names refer to the same thing? A. Krebs cycle and Calvin cycle B. Tricarboxylic acid cycle and citric acid cycle c. Citric acid cycle and Calvin cycle D. Tricarboxylic acid cycle and urea cycle |
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| 83 | The energy wastage occurs during A. Dark respiration B. Photosynthesis C . Glycolysis D. Photorespiration |
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| 84 | Who is called as ‘father of plant physiology’? A. K. V Thimann B. Stephen Hales c. M. Calvin D. E. Rabinowitch |
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| 85 | ( C_{3} ) cycle predominantly operates in A. Cytoplasm and mitochondria B. Mitochondria and peroxysome c. stroma D. Stroma and grana of a chloroplast |
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| 86 | The term photorespiration was coined by A. Decker and Tio. B. Julius von Sachs c. Rouhani. D. O-leri |
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| 87 | The process of photophosphorylation was discovered by A. Calvin B. Arnon c. Priestley D. Warburg |
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| 88 | Respiration initiated in chloroplasts and occurring in light is called A. Aerobic respiration B. Anaerobic respiration c. Fermentation D. Photorespiration |
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| 89 | Which of the following is not related with photosynthesis in purple sulphur bacteria :- A. Requirement of hydrogen doner B. Requirement of light c. Release of oxygen D. Use of atmospheric ( C O_{2} ) |
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| 90 | In the chart of photophosphorylation, what does ‘a’ represent? A. Cyt a B. Cyt ( a_{3} ) c. FRS D. PQ |
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| 91 | What is photorespiration? Explain the mechanism and its significance. | 11 |
| 92 | ( A cdot A-4, B-3, C-1, D-2 ) B. ( A-3, B-1, C-4, D-3 ) C. ( A-3, B-2, C-3, D-1 ) D. ( A-1, B-2, C-4, D-3 ) |
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| 93 | Assertion Cyclic pathway of photophosphorylation first appeared in some eubacterial species. Reason Oxygen started accumulating in the atmosphere after the non-cyclic pathway of photosynthesis evolved. 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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| 94 | Photooxidation of water results in the formation of ( mathbf{A} cdot mathbf{H}^{+}, mathbf{O}_{2}, ) ATP B . H ( ^{+}, mathrm{O}_{2}, mathrm{e}^{-}, ) ATP c. н ( ^{+}, 0_{2}, ) e ( ^{-} ) D. None of the above |
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| 95 | Study the figure which shows the effect of light on the rate of photosynthesis based on the graph, answer the following question: What does ( C ) represent on the curve? A. It represents that at higher light intensity there is no further increase in photosynthesis and other factors become limiting. B. It represents that at lower light intensity there is no further increase in photosynthesis and other factors become limiting. c. Maximum light intensity which can affect the rate of photosynthesis D. None of the above |
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| 96 | The correct sequence of involvement of the following in non-cyclic electron transport (i) PC (ii) PQ (iii) Pheo (d) Fd is ( mathbf{A} cdot ) ii, i, i, iii, iv B. iii, ii, iv, i c. iv , i, ii, iii D. iii, ii, i, iv |
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| 97 | During the Z scheme, electrons excited absorption of light in PSI are transferred to the primary acceptors, and therefore must be replaced. The replacements come directly from A. NADP в. Атр ( c . ) PS I D. water |
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| 98 | Which of the following is the first compound that accepts carbon dioxide during dark phase of photosynthesis? ( A ). NADP B. RuBP c. Ferredoxin D. cytochrome |
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| 99 | Plants like sugarcane and sorghum have indigenously developed system to overcome the loss by photorespiration as they are ………. plants. ( mathbf{A} cdot C_{4} ) в. ( C_{3} ) c. ( C_{2} ) D. ( C_{1} ) |
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| 100 | Who found that organic matter is synthesised with the help of solar energy? A . Hill B. Van Steil c. Mayer D. Bayer |
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| 101 | A potted plant was taken in order to prove a factor necessary for photosynthesis. The potted plant was kept in the dark for 24 hours. One of the leaves was covered with black paper in the centre. The potted plant was then placed in sunlight for a few hours. Why was the plant placed in the dark before beginning the experiment? |
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| 102 | In photosynthesis, carbon dioxide is converted to carbohydrates. It is a process A . Reductive B. Oxidative. c. catabolic and exergonic D. Reductive, anabolic and endergonic. |
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| 103 | Non-cyclic photophosphorylation results in production of A. ADP B. ATP c. NADPH D. ATP and NADPH |
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| 104 | State the law of limiting factor | 11 |
| 105 | Who among the following scientist was awarded the Nobel Prize in 1961 for tracing the path of carbon in photosynthesis? A. Huber B. Calvin c. Hatch D. Rubin |
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| 106 | How many molecules of water would be consumed to support one Calvin cycle? A. one B. Two c. Four D. six |
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| 107 | What is photophosphorylation? Distinguish between cyclic and noncyclic photophosphorylation. Give schematic sketches of both. | 11 |
| 108 | To develop proton gradient in respiration the required energy come from the oxidation of A. NADH B. NADH and ( H_{2} O ) ( c cdot O_{2} ) and ( mathrm{NADH} ) D. ( O_{2} ) |
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| 109 | For ( mathrm{NADPH}+boldsymbol{H}^{+} ) formation A . only PS lis required B. only PS II is required c. both PS I and PS I I are required D. only stroma is required |
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| 110 | During photorespiration, when two ( O_{2} ) molecules react with 2 moles of RUBP then how many ( 3-P G A ) molecules are formed from 2 molecules of ( 2- ) phosphoglycolate A . 2 B. 1 ( c .3 ) D. 4 |
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| 111 | Glycolate accumulates in chloroplast at A. Low temparature в. ( operatorname{Low} C O_{2} ) c. Visible light illumination D. High ( C O_{2} ) |
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| 112 | The scientist, who proved that bacteria use ( H_{2} S ) gas and ( C O_{2} ) to synthesize carbohydrate is A. Van Niel B. Ruben c. Jean Senebier D. Julius Robert Mayer |
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| 113 | Which of the following is not related to photorespiration? A. Peroxisomes B. Lysosomes c. Mitochondria D. chloroplasts |
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| 114 | Which of the following statement is/are correct for photorespiration? A. Glycerate diffuses out of peroxisome and enters chloroplast, here it is phosphorylated B. Glyoxylate is used in the synthesis of glycine in peroxisome C. In mitochondria when glycine is converted into serin at that time glycine first oxidized and later reduced D. Coordinated of chloroplast, peroxisome and mitochondrion is essential in photorespiration |
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| 115 | The first stable compound formed during the photosynthesis of ( C_{3} ) plants is A. Phosphoglyceric acid. B. Starch c. Pyruvic acid D. Ribulose diphosphate |
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| 116 | Name the scientists who have contributed to the following. (i) Reverse transcription. (ii) Photorespiration. (iii) Principle of limiting factors. (iv) Photolysis of water |
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| 117 | Photorespiration and photosynthesis both require A. Organic fuel B. Chlorophyll c. cytochromes D. Energy |
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| 118 | In photorespiration the number of ATP and NADPH synthesised are respectively A . 1 and 3 B. 2 and 3 ( c cdot 3 ) and 4 D. o and 0 |
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| 119 | NADPH is produced in photosynthesis during A. Dark reaction B. Non-cyclic photophosphorylation C. Pseudocyclic photophosphorylation D. Cyclic photophosphorylation |
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| 120 | Which of the following is not related to photorespiration? A. Lysosome B. Chloroplast c. Peroxisome D. Mitochondria |
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| 121 | Non-cyclic photophosphorylation produces A. NAD B. NADH c. NADPH D. NADP’ |
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| 122 | Blackman’s law of limiting factor is applied to A. Respiration B. Transpiration c. Photorespiration D. Photosynthesis |
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| 123 | Generally atmospheric ( C O_{2} ) is not limiting for hydrophytes since A. These plants fix ( H_{2} S ) in their photosynthesis. B. These plants obtain ( C O_{2} ) from water in the form of ( H C O_{3}^{-} ) c. Glucose is not required for their respiration. D. All of the above |
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| 124 | This Indian scientist and his group contributed immensely to ( C_{4} ) photosynthesis research A. J.C. Bose B. v.s.Rama Das c. P.K.K. Nair D. c.G.K Ramanujan |
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| 125 | Which one respiratory complex is coupled with ETS for ATP synthesis? A. Complex B. Complex III c. complex IV D. Complex |
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| 126 | Which of the following order is correct about the rate of photosynthesis under the light? A. Blue yellow > orange > red B. Blue > red > yellow > orange c. Red > Blue > yellow > orange D. Yellow > orange > blue > red |
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| 127 | Dark reaction of photosynthesis is called as A. Aphotic action B. Black action c. Blackman’s reaction D. None of the above |
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| 128 | The Calvin cycle proceeds in three stages. (1) Reduction, during which carbohydrate is formed at the expense of the photochemically made ATP and NADPH. (2) Regeneration, during which the carbon dioxide acceptor ribulose- 1,5 biphosphate is formed (3) Carboxylation, during which carbon dioxide combines with ribulose- -1, 5biphosphate Identify the correct sequence from the following. |
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| 129 | The correct sequence of cell organelles participating in photorespiration is A. Chloroplast – Peroxisome – Mitochondria B. Chloroplast – Vacuole – Peroxisome C. Chloroplast – Golgi bodies – Mitochondria D. Chloroplast – Rough endoplasmic reticulum Dictyosomes |
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| 130 | Calvin cycle occurs in A. Chloroplast B. Cytoplasm C . Mitochondria D. Glyoxysomes |
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| 131 | Photophosphorylation is the process in which A ( cdot C O_{2} ) and ( O_{2} ) unite B. Phosphoglyceric acid is produced. c. Aspartic acid is formed D. Light energy is converted into chemical energy through production of ATP |
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| 132 | Non-cyclic photophosphorylation involves A. PS-I and PS-II B. PS-I only c. PS-II only D. Stroma matrix |
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| 133 | Assertion Photorespiration is the respiration which occurs during the daytime. Reason Photorespiration is biochemically different from normal respiration involving glycolate mechanism. 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 |
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| 134 | While conversion of phosphoglyceric acid into phosphoglyceraldehyde during photosynthesis one of the following reactions occur A. Oxidation B. Reduction c. Electrolysis D. Hydrolosis |
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| 135 | Chloroplast involvement in photosynthesis was discovered by A. Julius von Sachs B. Mayer c. Ingenhousz D. Liebig |
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| 136 | The synthesis of ATP from ADP and inorganic phosphate is a(n) reaction that is coupled to a reaction known as A. Endergonic; Chemiosmosis B. Exergonic; Chemiosmosis c. Chemical; ATP synthase D. Chemiosmotic; ATP synthase |
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| 137 | Choose the correct answer from the alternatives given. The enzyme which catalyzes the photosynthesis in ( C_{4} ) cycle is A. PEP carboxylase B. RuBP carboxylase c. carbonic anhydrase D. hexokinase |
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| 138 | The production of ATP through chemiosmosis is known to occur in which of the following organisms? A. All cells (prokaryotic and eukaryotic) are capable of respiration using either oxygen or other electron acceptors. B. All cells (prokaryotic and eukaryotic), but only in the presence of oxygen. C. Eukaryotic cells only, and only when oxygen is present. D. All cells that possess mitochondria, and only when oxygen or other electron acceptors are present. |
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| 139 | What is photorespiration? How are photorespiratory losses overcome by ( C_{4} ) plants ? |
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| 140 | The product of oxygenation of RUBP is A. Phosphoglycerate B. Phosphoglycolate c. oxaloacetate D. Both A and B |
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| 141 | Look at leaves of the same plant on the shady side and compare it with the leaves on the sunny side or compare the potted plants kept in the sunlight with those in the shade. Which of them has leaves that are darker green? Why? |
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| 142 | Chief components of Hill’s reaction used in Blackman’s reaction are A. ATP and NAD B. ADP and NADP c. ATP and ( N A D P H_{2} ) D. All of the above |
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| 143 | Calculate how many ATP are synthesised and deduct the number of ATP utilised during glycolysis. |
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| 144 | The intensity of light beyond a particular limit is unable to increase the rate of photosynthesis. The phenomena is known as A. Light compensation point. B. Light saturation intensity c. Solarization D. None of the above |
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| 145 | 36. The first stable product of pho- tosynthesis is (1) Starch (2) Sucrose (3) Phosphoglyceric acid (4) Glucose |
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| 146 | What does the given diagram represent with respect to the various photosynthetic processes? A ( cdot C_{2} ) cycle B. Cyclic photophosphorylation c. Non-cyclic photophosphorylation D. z-scheme of photophosphorylation |
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| 147 | Which of the following is the main product in the photorespiration of ( boldsymbol{C}_{3} ) plants? A. Phosphoglycerate B. Phosphoglycolate c. Glycerate D. Glycolate |
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| 148 | Rearrange the following stages of Calvin cycle in correct order. 1. Reduction during which carbohydrate is formed at the expense of the photochemically made ATP and NADPH. 2. Regeneration, during which the carbon dioxide acceptor ribulose- 1,5 biphosphate is formed. 3. Carboxylation during which carbon dioxide combines with ribulose- 1,5 biphosphate. ( A cdot 3-rightarrow 1->2 ) B. 3->>2 c. ( 1->2-rightarrow 3 ) D. ( 2–>1->3 ) ( E cdot 1-rightarrow 3-rightarrow>2 ) |
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| 149 | Photorespiration occurs in A. Mitochondria B. Chloroplast c. Peroxisome D. Cytoplasm |
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| 150 | Photorespiration is a characteristic feature of plants having ( mathbf{A} cdot C_{4} ) cycle в. ( C_{3} ) cycle c. Aerobic respiration D. None of the above |
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| 151 | Assertion The proton gradient results in movement of protons across the membrane to stroma through the transmembrane channel of the ( F_{0} ) of the ATPase. Reason This proton gradient leads to release of energy 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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| 152 | Which of the following is not required for the Calvin cycle to occur? A. ATP, NADPH B. Carbon dioxide c. Light D. Ribulose bisphosphate |
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| 153 | Which of the following was used during discovery of Calvin cycle? A. Spirogyra B. Volvox c. chlamydomonas D. chlorella |
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| 154 | Ribulose diphosphate carboxylase enzyme catalyzes the carboxylation reaction between A. Oxaloacetic acid and acetyl CoA B. ( C O_{2} ) and ribulose 1,5 diphosphate c. Ribulose diphosphate and phosphoglyceraldehyde D. PGA and dihydroxy acetone phosphate |
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| 155 | What do ( C ) and ( D ) represent on the curve? |
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| 156 | Who demonstrated the role of light in plant nutrition? A. Von Helmont B. Stephen Hales c. Priestley D. None of the above |
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| 157 | Select the correct option: The correct sequence of flow of electrons n the light reaction is A. PSII, plastoquinone, cytochromes, PSI, ferredoxin B. PSI, plastoquinone, cytochromes, PSII ferredoxin c. PSI, ferredoxin, PSII D. PSI, plastoquinone, cytochromes, PSII, ferredoxin |
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| 158 | One molecule of glucose in Calvin cycle is formed from A ( cdot 6 C O_{2}+12 A T P ) в. ( 6 C O_{2}+30 A T P+12 N A D P H ) c. ( 6 C O_{2}+18 A T P+12 N A D P H ) D. ( 6 C O_{2}+18 A T P+30 N A D P H ) |
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| 159 | The given diagram illustrate Blackman’s law of limiting factor. Which of the factor can be considered as a limiting factor in the above diagram? Fig. 11.24 Ilustrate Blackman’s law of limiting factors A. carbon dioxid B. Temperature c. Intensity of light D. All of the above |
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| 160 | The increase in the ( ldots ). factor greatly the rate of photosynthesis. A. Slowest, increases B. Slowest, decreases c. fastest, increases D. None of the above |
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| 161 | Agranal chloroplasts occur in A. Succulent plants. B. ( C_{3} ) plants. c. ( C_{4} ) plants. D. Hydrophytes |
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| 162 | Which of the following is required both during photosynthesis and respiration? A. Phytochrome B. Cytochrome c. chlorophyll D. Glucose |
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| 163 | Assertion Except sciophyte and plants of dense forest, light is rarely a limiting factor in nature. Reason Light saturation occurs at 10 percent of full summer sunlight. 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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| 164 | Detailed study of pigment systems was carried out by A. Robert Hill B. H. P. Nanda c. Govindjee D. Emmerson |
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| 165 | What are phytoplankton? | 11 |
| 166 | Scientist who discovered the role of light in photosynthesis was A. Sachs B. Jan Ingenhousz c. Senebier D. Priestley |
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| 167 | In nature, the photosynthesis should proceed up to the limit of A. Light B. Temperature ( c cdot C O_{2} ) D. Moisture and wind |
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| 168 | Photorespiration is favoured by A . Low light and high ( O_{2} ) B. Low ( O_{2} ) and high ( C O_{2} ) C. Low temperature and high ( O_{2} ) D. High ( O_{2} ) and low ( C O_{2} ) |
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| 169 | In Kranz anatomy, the bundle sheath cells have A. Thin walls, many intercellular space and no chloroplast B. Thick walls, no intercellular spaces and large number of chloroplasts c. Thin walls, no intercellular spaces and several chloroplasts D. Thick walls, many intercellular space and few chloroplasts |
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| 170 | What is meant by photophosphorylation ? Discuss the cyclic photophosphorylation. |
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| 171 | Product of photorespiration is A. Phosphoglycerate B. Erythrose 4-phosphate c. Dihydroxy acetone 3-phosphate D. All of the above |
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| 172 | In ( C_{4} ) pathway carboxylation occurs twice. Discuss. |
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| 173 | ( ln C_{3} ) plants, the first stable product of photosynthesis during the dark reaction is A. Malic acid B. Oxaloacetic acid c. 3- Phosphoglyceric acid D. Phosphoglyceraldehyde |
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| 174 | Which one of the following would not be limiting factor in photosynthesis? ( A cdot O_{2} ) в. ( C O_{2} ) c. chlorophyll D. Light |
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| 175 | Whether Photorespiration is present at low light intensities. | 11 |
| 176 | Reduction process of ( C O_{2} ) and ATP formation in plants has relationship. In this rection, ATP is A. Formed B. Utilised c. Not utilised D. None of the above |
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| 177 | Photo-oxidation of water in photosynthesis is in association of A. Cytochrome ( b_{6} ) B. Pigment system- – c. Pigment system- – I D. Plastocyanin |
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| 178 | What is called as Warburgs effect on photosynthesis? A . Low rate of process due to ( O_{2} ) supply B. Low rate of process due to ( C O_{2} ) supply c. Both A and B D. None of the above |
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| 179 | The mechanism of ATP formation both in chloroplast and mitochondria is explained by A. Relay pump theory of Godlewski B. Cholodny-Went’s model c. chemiosmotic theory D. Munch’s pressure/ mass flow model |
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| 180 | What is the use of ATP binding site? | 11 |
| 181 | Under condition of constant ¡Illumination, the compensation period for a whole aquarium would be of infinite length when A. The biomass of animals equals the biomass of plants. B. The respiratory exchanges of the animals are equal to the photosynthesis exchanges of the plants. C. The oxygen intake of the animals equal of oxygen outputs of photosynthesis D. The carbon dioxide output of the animals and plants is equal to the photosynthetic intake of the plants. |
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| 182 | Given figure depicts the light harvesting complex (LHC) of photosystem I (PSI). Select the correct identification for ( mathbf{A}, mathbf{B} ) C and ( D ) A. A-molecules; B- Antenna molecule; C- ( P_{680} ; ) D- Primary ( e^{-} ) acceptor. B. A-Antenna molecules; B-Core molecule; ( P_{700} ; ) D- Primary ( e^{-} ) acceptor. C. A-Antenna molecules; B-Core molecule; ( P_{700} ; ) D- Plastocyanin D. A-Core molecules; B- Reaction centre; ( P_{680} ; ) D- Plastocyanin |
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| 183 | How many times the calvin cycle occur to produce two molecules of sucrose ( mathbf{A} cdot mathbf{6} ) B. 12 c. 18 D. 24 |
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| 184 | When ( N a H C O_{3} ) is added in small quantity in an experiment showing photosynthesis, what will be the effect on it? A. Rate will be lowered B. Rate will be increased c. Rate will be normal D. Process will stop |
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| 185 | Photorespiration takes place only in A. Lysosomes of plant cell B. Yellow parts of the plant c. Mitochondria of plant cell D. None of the above |
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| 186 | A plant in your garden avoids photorespiratory losses, has improved water use efficiency, shows high rate of photosynthesis at high temperature and has improved efficiency of nitrogen utilisation. In which of the following physiological groups would you assign this plant? A. ( C_{3} ) в. ( C_{4} ) c. сАм D. Nitrogen fixer |
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| 187 | Assertion Presence of photorespiration is considered as a wasteful and energy consuming process in crop plants, ultimately leads to reduction in yield. Reason During ( C_{3} ) synthesis upto ( 50 % C O_{2} ) fixed may have to pass through photosynthesis process to form carbohydrate such as sucrose. |
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| 188 | Which of the following statement regarding ( C_{4} ) plants is false? A. The primary ( C O_{2} ) acceptor is a 5 carbon molecule. B. The initial carboxylation reaction occurs in mesophyll. C . The leaves that fix ( C O_{2} ) have two cell types. D. The chloroplasts are dimorphic. E. The Calvin pathway does not take place in the mesophyll cells but does so only in the bundle sheath cells. |
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| 189 | Chemiosmosis is a universal mechanism by which organisms harvest and store energy. Which of the following best describes the process? A. It is the process of whereby a proton gradient drives an energy-requiring reaction. B. It is the process used to move protons up a concentration gradient for subsequent production of ATP C. It is the process that uses pumps to drive chemicals across the membrane D. It is the movement of specific chemicals against its gradient coupled to the flow of protons down its concentration gradient. |
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| 190 | Assertion The young stern of Funaria is photosynthetic Reason It contain hydroids A. If both the assertion and the reason are true and the reason is a correct explanation of the assertion B. If both the assertion and reason are true but the reason is not a correct explanation of the assertion C. If the assertion is true but the reason is false D. If both the assertion and reason are false |
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| 191 | ADP ( longrightarrow ) ATP reaction occurs when two protons ( left(boldsymbol{H}^{+}right) ) are passed from A. Thylakoid to cytosol B. Thylakoid to lumen c. Lumen of thylakoid to stroma D. Stroma to thylakoid lumen. |
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| 192 | Write the full form of G-6-PD | 11 |
| 193 | ATP was discovered by A. Blackman B. Bowman C. Lipmann D. Karl Lohmann |
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| 194 | Assertion Protons or hydrogen ions produced by photolysis of water accumulate in the lumen of thylakoids. Reason Photolysis of water takes place in inner membrane of thylakoid. 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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| 195 | Which of the following inhibits ( 0_{2} ) release in light phase? A. PMAA B. Zeatin c. DCMU D. None of the above |
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| 196 | Blackman’s law of limiting factor is applied to A. Growth B. Respiration c. Transpiration D. Photosynthesis |
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| 197 | Energy required to develop proton gradient during respiration comes from A. Oxidation process of ( N A D H ) B. Oxidation-reduction process of ( C O_{2} ) and ( N A D H ) respectively C. From heat energy developed during respiration D. Oxidation-reduction process of ( N A D P H ) and ( O_{2} ) respectively |
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| 198 | Electrons lost by PS II are regained from ( A cdot O_{2} ) в. ( C O_{2} ) ( mathrm{c} cdot mathrm{H}_{2} mathrm{O} ) D. None of the above |
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| 199 | Van Helmont concluded that plants get their food from A. Air B. water c. Humus D. Air and ( H_{2} O ) |
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| 200 | In photosynthesis, the energy is transferred in A. One energy step B. Small energy steps c. Large energy steps D. All of the above |
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| 201 | During photorespiration oxygen consuming reaction(s) occur in A. Stroma of chloroplasts & peroxisomes B. Stroma of Chloroplasts C. Grana of chloroplast and peroxisomes D. Stroma of chloroplasts and mitochondria |
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| 202 | Which cell organelle is not related with photorespiration? A. Mitochondria B. Chloroplast c. Glyoxysome D. Peroxysome |
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| 203 | If the ( C O_{2} ) content of the atmosphere is as high as 300 ppm A. All plants would be killed. B. The plants would not grow properly. C. Plants after growing for sometime gets killed. D. Plants would thrive well |
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| 204 | The first stable product of photosynthesis in ( C_{3} ) plants is A. 3- phosphoglyceric acid B. Dihydroxyacetone phosphate c. Fructose- – 6 – diphosphate D. Ribulose-1, 5- diphosphate |
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| 205 | Assertion ( ln C_{4} ) plants, photo respiration does not occur Reason ( C_{4} ) plants have a mechanism that increases the concentration of ( C O_{2} ) at the enzyme site. 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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| 206 | The percentage of sunlight utilized for photosynthesis by higher plants is A . ( 100 % ) B. ( 110 % ) c. ( 50 % ) D. 1 – 2 % |
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| 207 | Steps in non-cyclic photophosphorylation include passage of electrons along ( A cdot F R S longrightarrow F D longrightarrow C y t b_{6} longrightarrow ) Cyt ( f longrightarrow P C longrightarrow ) Chl a в. сhl a ( rightarrow ) cyt ( b_{6} longrightarrow ) Cyt ( f longrightarrow mathrm{PC} longrightarrow mathrm{PS} ) । ( longrightarrow mathrm{FRS} longrightarrow ) ( F D ) c. chl a ( rightarrow mathrm{PQ} longrightarrow mathrm{cyt} b_{6} longrightarrow mathrm{cyt} mathrm{f} longrightarrow mathrm{PC} rightarrow mathrm{PS} 1 rightarrow ) FRS ( rightarrow ) FD D. PQ ( rightarrow ) Cyt ( b_{6} rightarrow ) Cyt ( f longrightarrow P C longrightarrow P S 1 longrightarrow F R S longrightarrow F D ) |
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| 208 | In Blackmann’s Law of limiting Factors the rate of photosynthesis continues to increase with the successive increase in the amounts of A. Carbon dioxide, light, temperature B. Temperature, light, carbon dioxide c. Light, temperature, carbon dioxide D. Light, carbon dioxide, temperature |
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| 209 | In the following dark reaction of photosynthesis, ( 6 C O_{2}+6 H_{2} O+A+12 N A D P H+H ) A and B stand for A . 18 ADP, 18 ATP B. 12 ATP, 18 ATP c. 18 ATP, 18 ADP D. 12 АтР, 12 АDP |
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| 210 | What will be the effect, when very high intensity of light is supplied to a photosynthesis system? A. Process will increase B. Process will decrease c. Process will stop due to solarization D. None of the above |
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| 211 | The first important biological investigation, which led to the conclusion that plant makes its substance from water and not from soil carried out by A. Lamarck B. De Vries c. van Helmont D. Darwin |
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| 212 | In photosynthetic electron transport system, Mn ions are associated with A. ( C F_{0}-C F_{1} ) complex B. ( mathrm{cyt} b_{6}- ) Cyt f complex c. oxygen evolving complex D. Plastoquinone. |
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| 213 | Action spectrum of photosynthesis was discovered in 1883 by A. Engelmann B. Calvin c. Arnon D. Hill |
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| 214 | The concept that light energy is converted to chemical energy in photosynthesis was given by A. Priestley B. Meyer c. stephen Hales D. Helmont |
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| 215 | Assertion The external factors that affect photosynthesis are number, size, age and orientation of leaves, mesophyll cells and chloroplasts and the amount of chlorophyll. Reason The internal factors that affect photosynthesis are availability of sunlight, temperature ( , C O_{2} ) concentration and water 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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| 216 | How many molecules of ATP and NADPH are require in formation of two molecules of glucose? How many Calvin cycles are required? A. 36 ATP, 24 NADPH, 12 Calvin cycles B. 18 ATP, 12 NADPH, 6 Calvin cycles c. 36 ATP, 24 NADPH, 6 Calvin cycles D. 24 ATP, 36 NADPH, 12 Calvin cycles |
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| 217 | Which enzyme fixes ( C O_{2} ) in Calvin cycle? A. RUBP carboxylase B. PEP carboxylase c. Carbonic anhydrase D. Hexokinase |
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| 218 | 24. Statement : Cactus plants are fleshy but need least water. Conclusions : I. All fleshy plants are cactus. II. Cactus plants need least water. (1) Neither I nor II follows (2) Only II follows (3) Both I and II follows (4) Only I follows |
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| 219 | Peroxisomes are related in A. Photosynthesis B. Photorespiration C . Respiration D. None of the above |
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| 220 | ( N H_{3} ) releases during which of the following process? A. Photorespiration B. Dark respiration c. сАм D. All of the above |
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| 221 | Explain the Hatch-Slack pathway. | 11 |
| 222 | Radioactive isotope used by Calvin to elucidate Calvin cycle was ( mathbf{A} cdot P^{12} ) B ( cdot C^{14} ) ( c cdot S^{3} ) D. ( O^{13} ) |
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| 223 | How many turns of Calvin cycle would generate one molecule of glucose/hexose? A. One cycle B. Three cycles c. six cycles D. Twelve cycles |
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| 224 | ( M g^{2+} ) and ( C l^{-} ) are required during transfer of electron from A ( cdot O H^{-} ) to ( C h l ) orophyll ( -a_{683} ) B. ( O H^{-} ) to ( P_{700} ) c. ( F D ) to ( F R S ) D. Cytochrome ( -b ) to cytochrome ( -f ) |
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| 225 | Sugarcane and corn are one of the most efficient plants in trapping light energy because A. They have ( C_{4} ) acid cycle B. They do not involve photorespiration c. They perform calvin cycle D. All of the above |
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| 226 | Thylakoid name was given by A. Arnon B. Park and Biggins c. Park and Frotan D. Menke |
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| 227 | Which one of the following is limiting rate of photosynthesis in nature A. Light в. ( C O_{2} ) ( c cdot O_{2} ) D. chlorophyll |
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| 228 | R. Hill used which of the following dye for his famous Hill-reaction? A. Dichlorophenolindophenol (DCPIP) B. Sulphur green c. Methylene blue D. Eosine |
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| 229 | During photorespiration, in which of the following NAD is reduced? A. Mitochondria and peroxisome B. Chloroplast and peroxisome c. chloroplast and mitochondria D. Mitochondria |
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| 230 | What is the site of formation of glycoxylate from glycolate? |
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| 231 | Number of ATP molecules required for regeneration phase of RuBP during synthesis of 1 glucose molecule is ( A cdot 6 ) B. 12 ( c cdot 18 ) D. 30 |
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| 232 | Photo-respiratory reactions are operated in A. Chloroplasts, ribosomes and peroxisomes B. Chloroplasts, mitochondria and peroxisomes C. Mitochondria, peroxisomes and lysosomes D. Mitochondria, chloroplasts and ribosomes |
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| 233 | Match the name of the scientists with their important contributions given under. Choose the answer which gives correct combination. ( A cdot A-4, B-1, C-3, D-2 ) B. ( A-1, B-4, C-2, D-3 ) c. ( A-2, B-1, C-3, D-4 ) D. ( A-4, B-3, C-2, D-1 ) E . ( A-3, B-2, C-1, D ) |
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| 234 | State whether the following statement is true or false: Plants do not respire whereas animals |
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| 235 | Find out the correct combinations concerning components of photosynthetic electron transport, location in relation to thylakoid and action. I. OEC – lumen side – water reduction. II. Plastocyanin – lumen side – electron transfer from cyt f to PSI III. Ferrodoxin – stroma side – reduction of ( N A D^{+} ) to ( N A D H ) IV. Cytochrome complex – integral protein – transfer electrons from ( boldsymbol{P} boldsymbol{Q} boldsymbol{H}_{2} ) to PC. Choose the correct answer. A. Il and IV B. I and III c. Il and III D. I and IV |
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| 236 | Oxysomes were discovered by A. Palade B. Benda c. Fernandes-Moran D. Luch and Rich |
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| 237 | What is ( C_{2} ) Cycle? A. Glycolate cycle B. Calvin cycle c. Krebs cycle D. TCA cycle |
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| 238 | Which of the following cell organelles is associated with photorespiration? A. Mitochondria B. Peroxysome c. chloroplast D. All of the above |
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| 239 | During chemiosmotic synthesis of ATP, protons diffuse through ( C F_{0} ) channels that activates ATPase enzyme. As a result, one molecule of ATP is formed when ( _{text {一一一一一一一一 }} ) passes through ATPase. ( mathbf{A} cdot 4 H^{+} ) в. ( H^{+} ) ( mathbf{c} cdot 2 H^{+} ) D. ( 6 H^{+} ) |
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| 240 | Name the three organelles involved in photorespiration. |
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| 241 | Which is not an electron carrier? A. ( operatorname{col} ) B. cyt c. cyt a D. ( H_{2} O ) |
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| 242 | What is the first stable intermediate product of photosynthesis? A. Glucose B. Formaldehyde c. Phosphoglyceric acid D. PGAL |
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| 243 | Match the sites in list I with the processes in list II and choose the correct combination from the options. ( A cdot A-4, B-3, C-2, D-1 ) B. ( A-1, B-2, C-4, D-3 ) c. ( A-2, B-3, C-4, D-1 ) D. ( A-3, B-4, C-1, D-2 ) |
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| 244 | Respiration initiated in chloroplast and occurs in light is called as A. Aerobic respiration B. Anaerobic respiration c. Photorespiration D. Fermentation |
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| 245 | Choose the correct answer from the alternatives given Which of the following is most closely associated with the Calvin cycle? A. ATP production B. Oxygen production c. Carbon dioxide fixation D. Carbon dioxide production |
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| 246 | The sequence of cell organelles during photorespiration is A. Chloroplast – Golgi bodies – Mitochondria B. Chloroplast – Rough endoplasmic reticulum Dictyosomes C. Chloroplast-Peroxisomes-Mitochondria D. Chloroplast – Vacuole – Peroxisome |
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| 247 | Photosynthetic Active Radiation (PAR) has which of the following range of wavelengths? A. ( 400-700 mathrm{nm} ) B. 450-920 nm c. ( 340-450 mathrm{nm} ) D. 500-600 nm |
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| 248 | If the ( C O_{2} ) content of the atmosphere is as high as 300 parts per million A. All plants would be killed B. The plants would not grow properly C. Plants would grow for some time and then die D. The plants would thrive well |
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| 249 | Reducing power generated during light reaction is used during formation of A. 3-phosphoglyceraldehyde from RuBP B. Sucrose from triose phosphate c. Glyceraldehyde 3-phosphate from 3-phosphoglycerate D. RuBP from triose phosphate |
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| 250 | The term dephlogisticated air was given by A. Von Mayer B. Van Helmont c. warburg D. Priestely |
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| 251 | Chemiosmotic mechanism of ATP synthesis was proposed by A. Warburg B. Dickens c. Krebs D. P. Mitchell |
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| 252 | A cell can carry out its constant and intensive metabolic activities with relatively small amounts of such vital components as ATP, ( N A D^{+}, ) coenzyme A, etc. because it can A. rapidly recycle these compounds B. bypass reactions that require these compounds c. incur an oxygen debt until these compounds become available D. utilize substitute molecules in place of these compounds |
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| 253 | Which is called as Warburg’s effect on photosynthesis? A . Low rate of the process due to ( O_{2} ) supply B. Low rate of the process due to ( C O_{2} ) supply c. Both A and B D. None of the above |
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| 254 | In electron transport system, the last electron acceptor of photophosphorylation is ( mathbf{A} cdot N A D P H ) B. ( N A D P^{+} ) c. Atomic oxygen D. chlorophyll a |
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| 255 | The energy stored in one molecule of NADPH and one molecule of ATP are and ( ldots ldots . ) respectively. A. 52 kcal, 7 kcal B. 520 kcal, 70 kcal c. 150 kcal, 22 kcal D. 650 kcal, 90 kcal |
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| 256 | ( ln C_{4} ) plant ( R u B i s C O ) activate during: A . Day B. Night c. Midnight D. Remain activated all time |
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| 257 | State whether the following statements are true or false.
ATP is a protein that supplies energy to |
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| 258 | Which one of the following elements is required for photosynthetic oxygen evolution? A. copper B. Iron c. Manganese D. zinç |
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| 259 | The rate of photosynthesis decreases if the wavelength of visible light exceeds ( 680 mathrm{nm} . ) This was shown by which scientist and what is it’s reason? A. Black man – Law of limiting factor B. Calvin and Benson – Photooxidation c. Emerson and Arnold – Red drop D. Ruben and Kamen – Photolysis |
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| 260 | The substrate for photorespiration is which of the following? A. Serine B. Glycolate c. Indole acetic acid D. Malic acid |
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| 261 | Statement a. Photorespiration decreases photosynthetic output. Statement b. In photorespiratory pathway, neither ATP nor NADPH is produced A. Both the statements a and b are correct. B. Both the statements a and b are wrong C. Statement a is correct and statement b is wrong. D. Statement b is correct and statement a is wrong. |
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| 262 | In case of ( C_{4} ) plants, the acceptor of ( C O_{2} ) is A. Phosphoglyceraldehyde B. Ribulose monophosphate. c. Phosphoenolpyruvate. D. Ribulose diphosphate |
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| 263 | Action spectrum of photosynthesis was discovered by A. Calvin B. Engelman c. Blackman D. Hill |
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| 264 | In Hatch and Slack pathway the A. Chloroplasts are of same type B. Occurs in Kranz anatomy, where mesophyll cells have small chloroplasts whereas bundle sheath cells have agranal chloroplasts C. Occurs in Kranz anatomy, where mesophyll cells have small chloroplasts whereas bundle sheath cells have larger chloroplasts D. Kranz anatomy, where mesophyll cells are diffused |
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| 265 | What will be the effect of intermittent light on photosynthesis? A. It will increase B. It will decrease c. will not be effected D. Process will stop |
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| 266 | In photosrespiration, glycine passes from A. Chloroplast to peroxisome B. Chloroplast to mitochondrion c. Peroxisome to mitochondrion D. Mitochondrion to peroxisome |
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| 267 | Energy released during movement of electrons through the photosystems in photosynthesis is used to drive protons across the membrane against concentration gradient. As a result the protons accumulate in A. thylakoid lumen B. stroma of chloroplast c. matrix of mitochondrion D. none of these |
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| 268 | Most of the plants contain a green colouring pigment which is responsible for photosynthesis. This pigment was named chlorophyll by A. Melvin Calvin B. Jean Senebier c. Julius Robert Mayer D. Pelletier and Caventou |
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| 269 | When a photosynthetic plant is transferred to an atmosphere of enriched ( O_{2} ) its rate of A. Photosynthesis would increase. B. Photosynthesis would decrease. c. Respiration would decrease. D. osmosis would increase. |
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| 270 | Aerosols inhibits photosynthesis by A. consuming ( O_{2} ) from air B. Competing with ( C O_{2} ) c. Blocking stomata by enhancing particulate matter settlement on the leaves. D. Decreasing air pollution and reducing ( C O_{2} ) |
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| 271 | Photosynthesis (nourishment in light) was discovered by A. Stephan Hales B. Priestley c. Ingenhousz D. Van Mayer |
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| 272 | Assertion The atmospheric concentration of ( boldsymbol{C O}_{2} ) at which photosynthesis just compensates for respiration is referred to as ( C O_{2} ) compensation point. Reason The ( C O_{2} ) compensation point is reached when the amount of ( C O_{2} ) uptake is less than that generated through respiration, because the level of ( C O_{2} ) in the atmosphere is more than that required for achieving ( C O_{2} ) compensation point. 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. |
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| 273 | Which one is false about kranz anatomy? A. Bundle sheath have large chloroplast and less developed grana. B. Mesophyll cells have large chloroplasts. C. It is found in atriplex, sugarcane, maize. D. Plant having it have better photosynthesizing power than ( c_{3} ) plants. |
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| 274 | 34. Which of the following types of light are strongly aborted by plants ? (1) violet and orange (2) blue and red (3) Indigo and yellow (4) yellow and violet |
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| 275 | Which scientists are related with light reaction and what is its site? A. Arnon and Hill, grana B. Ruben and Kamen, Stroma C. Willstatter, Stoll, inner membrane of chloroplast D. Calvin and Benson, outer membrane of choloplast |
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| 276 | Statement A: Photorespiration decreases photosynthesis output. Statement B: In photorespiratory pathway, neither ATP nor NADPH is produced. A. Both the statements ( A ) and ( B ) are correct. B. Both the statements A and B are wrong. C. Statement A is correct and Statement B is wrong. D. Statement B is correct and statement A is wrong. |
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| 277 | 41. Which of the following plant pig- ments absorbs in red and far-red region of light? (1) Carotenoide (2) Chlorophyll (3) Phytochrome (4) Cryptochrome |
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| 278 | The process of photosynthetic photophosphorylation was described by A. Blackman в. ні|| c. Arnon D. Benson |
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| 279 | Light energy is not used directly or indirectly in which of the following option? A. Splitting of ( H_{2} O ) B. To develop proton gradient during photophosphorylation c. ( C O_{2} ) reduction in dark reaction D. To develop proton gradient during oxidative photophosphorylation |
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| 280 | Photorespiration requires this activity by an enzyme A. Hydrolase B. Oxygenase c. carboxylase D. ATPase |
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| 281 | During photorespiration which compounds are formed having ( 2 C ) and ( 3 mathrm{C} ) respectively in peroxisome? A. Phosphoglycerate, glycolate B. Glycine, glycerate c. serine, glycine D. Glycolate, glycine |
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| 282 | What is the product of oxygenase acitivity of Rubisco? A. Phosphoglycerate B. Phosphoglycolate c. Both A and B D. Phosphoglyceraldehyde |
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| 283 | Write three differences between ( C_{3} ) and ( C_{4} ) cycles. |
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| 284 | The reaction that is responsible for the primary fixation of ( C O_{2} ) is catalysed by A. ( R u B P ) carboxylase B. ( P E P ) carboxylase c. ( R u B P ) carboxylase and ( P E P ) carboxylase D. ( P G A ) synthase |
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| 285 | The first stable product of Calvin cycle is A. 3- phosphoglycerate. B. 1,3- biphosphoglycerate. c. Glyceraldehyde-3- phosphate. D. Ribulose-5- phosphate. |
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| 286 | Identify the correct statement(s) in relation to ( C_{4} ) photosynthesis. A. Kranz anatomy is an essential feature for ( C_{4} ) plants B. ( C_{4} ) plants have higher water use efficiency than ( C_{3} ) plants C. Photorespiration can be minimized when ( C_{4} ) pathway is in operation D. All of the above |
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| 287 | In cyclic photophosphorylation, which one of the following is formed? A. ATP B. NADP and ATP ( mathrm{c} cdot mathrm{NADH}_{2} ) and ( O_{2} ) D. NADPH ( _{2} ), ATP and ( O_{2} ) |
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| 288 | Petiole of Australian Acacia helps in? A. Respiration B. Photosynthesis c. Transpiration D. Secretion |
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| 289 | toppr loGıl Q Type your question_ 11 cycle at stage ( –A_{-}- ) (ii) Hydrogen from reduced hydrogen acceptor is used at stage ( –B_{-} ) (iii) Energy from ATP is used to drive stage ( –mathrm{C}_{-} ) (iv) The substance formed at position ( mathbf{Y} ) Y is ( -n ) (v) If one molecule of substance Y is released per cycle, the cycle must turn ( mathrm{E}_{–} ) times for one molecule of sucrose ( left(C_{12} H_{22} O_{11}right) ) to be built up at position Z. ( mathbf{A} cdot A-4 ; B-2 ; C-2 ) and ( 3 ; D-3 ) carbon sugar; ( E-4 ) B . ( A-3 ; B-3 ; C-1 ) and ( 2 ; D- ) pyruvicacid; ( E-2 ) ( mathbf{c} cdot A-2 ; B-4 ; C-3 ) and ( 4 ; D-g l u operatorname{cose}-1- ) phosphate, ( E-8 ) D. ( A-1 ; B-1 ; C-2 ) and ( 4, D- ) citricacid ( E-12 ) |
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| 290 | The microelement which is an integral part of electron carrier that transfers electrons from cyt b-f complex to PS I is also a component of A. Nitrate reductase B. Cytochrome c-oxidase c. IAA-oxidase D. Dinitrogenase |
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| 291 | ( N a^{+}, K^{+} ) pump is found in membranes of many cells, like nerve cells. It work against electro chemical gradient and involve an integral protein ATP. For each molecule of ATP used A. 3 ions of ( N a^{+} ) pumped out and ( 2 K^{+} ) are taken in B. 3 ions of ( N a^{+} ) are taken in and 2 ( K^{+} ) are pumped out. C. 2 ions of ( N a^{+} ) are thrown out and ( 3 K^{+} ) are absorbed. D. 3 ions of ( K^{+} ) are absorbed and 3 ( N a^{+} ) are pumped out |
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| 292 | Organelles having enzymes involved in photorespiration are A. Mitochondria, chloroplasts and ribosomes B. Mitochondria, peroxisomes and chloroplasts c. Mitochondria, nucleus and ribosomes D. Mitochondria, peroxisomes and glyoxysomes |
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| 293 | ETC of photosynthesis process is A. Bound to thylakoid membrane B. Present in stroma C. Bound to outer chloroplast membrane D. Dispersed in cytosol |
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| 294 | Photorespiration is also called as A ( cdot C_{2} ) cycle B. ( C_{3} ) cycle ( mathbf{c} cdot C_{4} ) cycle D. None of the above |
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| 295 | Calvin cycle is A. Dependent on light B. Not dependent on light C. All of the above D. None of the above |
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| 296 | Present atmospheric ( boldsymbol{C O}_{2} ) concentration is not limiting factor for ( C_{4} ) plants as ( C_{4} ) plants A. Posses PEPcase as primary carboxylase enzyme B. Primary carboxylation reaction product is a four carbon acid C. No oxygenation of RUBP due to kranz anatomy D. Primary carboxylation reaction occurs in mesophyll cells |
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| 297 | In Kranz anatomy, the bundle sheath cells have A. Thin walls, no intercellular spaces and several mitochondria B. Thin walls, many intercellular spaces and few chloroplast c. Thin walls, many intercellular spaces and no chloroplast D. Thik walls, no intercellular spaces and large number of chloroplast |
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| 298 | Which of the following is correct in regards to photorespiration? A. In mitochondria, serine in converted into hydroxypyruvate B. In mitochondria, two glycine molecules unite to form serine C. In mitochondria, glycolate is oxidised to form glyoxylate D. In peroxisomes, three molecules of glycine unite to form serine |
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| 299 | The substrate for photorespiration is A. Glycolate. B. Glucose. c. Lipid. D. sucrose. |
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| 300 | What does not occur in photorespiration? A. Utilization of ( O_{2} ) B. Production of ( C O_{2} ) c. synthesis of ATP D. All of the above |
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| 301 | Carbon dioxide acceptor in ( C_{3} ) plants is A. PEP B. RuBP. c. PGA D. NADP. |
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| 302 | Study the graph which shows results of three different experiments ( P, Q ) and ( R ) What does this experiment tell you about the factors limiting the rate of photosynthesis in the regions ( A-B ) and B-C of curve R? A. A-B was light intensity and B- C was some other factor (cannot find from available data) B. A-B was temperature and B- C was light intensity C. A-B was some other factor (cannot find from available data) and B- C was light intensity D. None of the above |
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| 303 | Photorespiration is favoured by A. Low temperatures B. Low light intensity ( mathrm{c} cdot mathrm{High} mathrm{O}_{2} ) and ( operatorname{low} mathrm{CO}_{2} ) D. Low ( O_{2} ) and high ( C O_{2} ) |
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| 304 | Chloroplast dimorphism is a characteristic feature of A. Plants with Calvin cycle B. ( C_{4} ) plants c. All plants D. only in algae |
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| 305 | In photosynthesis, for the fixation of one mole of glucose, the number of ATP and NADPH ( _{2} ) required is ( A cdot 12 ) and 18 B. 18 and 12 . c. 6 and 12 . D. 18 and 18 . |
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| 306 | During photosynthesis, for the synthesis of one mole of glucose, the number of ATP and NADPH ( _{2} ) required are … and dots…. respectively. A. 12,18 B. 18,12 ( c cdot 6,12 ) D. 18,18 |
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| 307 | Photorespiration is a characteristic of A. CAM plants B. ( C_{3} ) plants C ( . C_{4} ) plants D. None of the above |
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| 308 | Decreased rate of photosynthesis at high concentration of ( boldsymbol{O}_{2} ) is referred to a A. Pasteur effect B. Emerson effect c. warburg effect D. Richmond Lang effect |
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| 309 | In photorespiration, peroxisome helps in A. Synthesis of PGA B. Reduction of glyoxylate c. oxidation of glycolate D. oxygenation of glycolate |
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| 310 | Compensation point is A. Where there is neither photosynthesis nor respiration B. When rate of photosynthesis is equal to the rate of respiration C. When entire food synthesized into photosynthesis remain utilized D. When there is enough water just to meet the requirement of plant |
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| 311 | Action spectrum of photosynthesis was first studied by A. Blackman B. Van Mayer c. Engelmann D. Boussingault |
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| 312 | During photosynthesis ( A cdot O_{2} ) evolved comes from ( C O_{2} ) B. ATP is formed C. ATP is not formed D. Water is required as medium but it does not take part in photosynthesis |
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| 313 | Photorespiration involves oxidation of A. Chlorophyll a B. PGAA c. RuBP D. Both B and C |
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| 314 | A plant is exposed to an optimum amount of light intensity, with a limited supply of ( mathrm{CO}_{2} ). As the carbon dioxide concentration increases A. The rate of photosynthesis increases B. The rate of photosynthesis decreases c. The rate of photosynthesis remains constant D. None of the above |
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| 315 | Coupling factor- F occurs over A. Ribosome B. Stroma c. Matrix D. Thylakoids |
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| 316 | How many rounds of Calvin cycle are required to form one hexose molecule? A .2 B. 6 ( c cdot 4 ) ( D ) |
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| 317 | Law of limiting factor was proposed by ( A ). Robot Hill B. Kolvin c. Blackmann D. Arnon |
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| 318 | The isotope of carbon used extensively for studies in photosynthesis is ( mathbf{A} cdot^{13} C ) B. ( ^{14} C ) ( mathbf{c} cdot^{15} C ) D. ( ^{16} C ). |
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| 319 | Photorespiratory reactions are operated in the A. Chloroplasts, ribosomes and peroxisomes. B. Chloroplasts, mitochondria and peroxisomes. C. Mitochondria, preoxisomes and lysosomes. D. Mitochondria, chloroplasts and ribosomes. |
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| 320 | Photosynthetic yield is reduced due to A. Plasmolysis of cell B. Glycolysis of glucose c. Photolysis of water D. Photorespiration |
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| 321 | Write notes on (a) Compensation point (b) The blackman’s principle of limiting factors (c) Rubisco (d) Photorespiration and aerobic respiration (e) Light reaction and dark reaction (f) ( C_{3} ) and ( C_{4} ) plants |
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| 322 | Who is called as ‘father of Indian plant physiology’? A. J. C. Bose B. Calvin c. R. Mishra D. K. K. Nanda |
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| 323 | ( C O_{2} ) acceptor in ( C_{3} ) plants is A. Xylulose-5-phosphate B. 3-phosphoglyceric acid c. Ribulose 1,5 -biphosphate D. Phosphoenol pyruvic acid |
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| 324 | In fluorescence experiment, which of the light is used? A . Red B. Visible c. uv D. Infrared |
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| 325 | Assertion Each molecule of NADPH and two ATP are required for the fixation of one molecule of ( boldsymbol{C O}_{2} ) Reason Three molecule of NADPH and two ATP are required the for fixation of one molecule of ( boldsymbol{C O}_{2} ) 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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| 326 | Who proposed the cycle of events leading to the fixation of ( C O_{2} ) in mesophyll and its reduction in bundle sheath? A. Emerson B. Melvin Calvin c. Hatch and Slack D. Hill and Bendall |
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| 327 | Which of the following are related with photorespiration? A. spherosome B. Lysosomes c. Glyoxysomes D. Peroximomes |
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| 328 | The enzyme responsible for primary carboxylation in ( C_{3} ) plants is A. Hexokinase B. Succinic dehydrogenase c. Pyruvate carboxylase D. RuBP carboxylase oxygenase |
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| 329 | Root pressure theory was supported by A. Dixon B. Stephen Hales c. Levitt D. sachs |
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| 330 | Photorespiration is also called A. ( C_{2} ) cycle B. ( C_{3} ) cycle c. ( C_{4} ) cycle D. ( C_{5} ) cycle |
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| 331 | ATP synthesis in cell requires ( mathbf{A} cdot H^{+} ) gradient across the membrane B. ( K^{+} ) gradient across the membrane C ( cdot P O_{4}^{3-} ) gradient across the membrane D. ( C a^{2+} ) gradient across the membrane |
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| 332 | ATP synthesis during light reaction is A. Oxidative phosphorylation B. Photolysis c. Photophosphorylation D. Phosphorylation |
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| 333 | Study the graph which shows results of three different experiments ( P, Q ) and ( R ) Now compare curves ( Q ) and ( R ) and answer the following question: Which factor has been altered to produce the differences you can see between two curves? ( A cdot C O_{2} ) concentration B. Temperature ( c . ) Both ( A ) and ( B ) D. None of the above |
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| 334 | Peroxisomes are found in A. Bundle sheath B. Endospem C . Mesophyll cell D. Vascular bundle |
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| 335 | What is the disadvantage of photorespiration? Explain how the photorespiratory losses are overcome in plants like sugarcane. |
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| 336 | In PS I, the reaction centre Chl a has absorption maxima at whereas in PS II, the reaction centre Chl a has absorption maxima at A. ( 700 mathrm{nm}, 680 mathrm{nm} ) B. ( 680 mathrm{nm}, ) 700nm c. ( 400 mathrm{nm}, 500 mathrm{nm} ) D. 700 ( mathrm{nm}, 800 mathrm{nm} ) |
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| 337 | Write any three differences between photo respiration and dark respiration. | 11 |
| 338 | Which of the following is formed during photorespiration? A. Sugar B. Phosphoglycolate c. NADPH D. ATP E. Oxaloacetate |
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| 339 | What is the PAR range? A. ( 200 n m-800 n m ) B. 400nm – 700nm c. ( 350 n m-550 n m ) D. ( 600 n m-100 n m ) |
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| 340 | What is the law of limiting factors? Explain it with an illustration. | 11 |
| 341 | Photorespiration occurs in A. Ribosomes B. Mitochondria c. Peroxisomes D. Both B and C |
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| 342 | Why does the total amount of ( C O_{2} ) in the atmosphere remains constant even though respiration liberates ( C O_{2} ? ) ( A cdot C O_{2} ) acts as a buffer B. ( C O_{2} ) is converted to carbohydrates in photosynthesis ( mathrm{c} cdot mathrm{CO}_{2} ) forms carbonic acid D. ( C O_{2} ) undergoes cleavage during photosynthesis |
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| 343 | For synthesis of one gram of hexose, the land plant consumes A. Only ( 1 / 3 ) rd of the ( C O_{2} ) of air B. Only ( 1 / 4 ) th of the ( C O_{2} ) of air C. only ( 2 / 3 ) rd of the ( C O_{2} ) of air D. None of the above |
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| 344 | The three cardinal points related to photosynthesis was proposed by A. Blackman B. Sachs c. Roger slack D. None of the above |
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| 345 | Correct percentage of ( mathrm{CO}_{2} ) present in the atmosphere is A . 0.03% B. 0.3%. c. ( 1 % ) D. 1.1% |
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| 346 | Conversion of light energy into chemical energy within the plant body was first stated by? A. Mayer and Anderson B. Calvin c. Robert Mayer D. Willstatter and Stoll |
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| 347 | Match the items of column I and column I ( begin{array}{llll}text { Column } & & text { Column II } & \ & text { I } & & \ text { a } & text { Mitchell } & text { p } & begin{array}{l}text { Steps of dark reaction } \ text { to photosynthesis }end{array} \ text { b } & text { Gibbs } & text { q } & text { Photophosphorylation } \ text { c } & text { Arnon } & text { r } & text { Concept of free energy } \ text { d } & text { Calvin } & text { s } & begin{array}{l}text { Chemiosmotic } \ text { hypothesis }end{array} \ & text { t } & text { Mass flow hypothesis }end{array} ) ( A cdot a-s, b-t, c-r, d-q ) B. ( a-s, b-r, c-p, d-q ) ( c cdot a-r, b-s, c-p, d-q ) D. a-s, b-r, c-q, d-p |
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| 348 | Electron vacancy in PSI in ETS is replaced by A. PSII B. Plastocyanin c. Photolysis of water D. None of these |
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| 349 | 28. The process of photosynthesis involves conversion of (1) chemical energy into radiant energy (2) chemical energy into mechan- ical energy (3) solar energy into chemical energy (4) mechanical energy into solar energy |
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| 350 | The enzymes ribulose biphosphate carboxylase-oxygenase and phosphenol pyruvate carboxylase are activated by A . Mg B. zn c. мо D. Mn |
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| 351 | Which one of the following is not a limiting factor for photosynthesis? A. Oxygen B. Carbon dioxide c. chlorophyll D. Light |
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