Respiration In Plants Questions

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Respiration In Plants Questions

List of respiration in plants Questions

Question NoQuestionsClass
1Describe Kreb’s cycle. (Flow chart or
Explanation)
11
2STRUCTURED/APPLICATION/SKILL TYPE
Given below are chemical reactions 11 to
5) involving glucose and five other chemical products (A-E)

Write the reaction number of the
following:
Anaerobic respiration in plants

11
3The number of ATP molecules formed
during aerobic respiration in the break down of one glucose molecule via the malate-aspartate shuttle is
A. 38
B. 18
( c cdot 28 )
( D cdot 4 )
11
4A respiratory cycle where ( N A D H_{2} ) is
produced is the
A. Calvin cycle.
B. Krebs cycle.
c. EMP pathway
D. HMP shunt
11
5Which one is not correct with given
marks?
A. B-carboxylation- fixation of ( C O_{2} ) the aldose sugar
B. C- reduction – reverse of glycolysis
C. A- regeneration – reformation of pentose sugar
D. C- reduction – carbohydrate formation
11
6Define RQ. What is its value for fats?11
7Which one is not correct for oxidation of
food?
A. It is multiple process
B. All released energy is traped in form of ATP
C. Traped energy is further used for bio synthesis of other molecules
D. Oxidisable compound is known as respiratory substrate
11
8Largest amount of phosphate bound energy is produced in the process of respiration during
A. Anaerobic respiration
B. Glycolysis
c. Krebs cycle
D. None of the above
11
9Mitochondria is the site for
A. Krebs cycle
B. Calvin cycle
C. Anaerobic respiration
D. Trapping of sun light
11
10Net energy gain from malic acid and succinic acid are
Malic acid: 3
Succinic acid: 5
Justify the mentioned values.
11
11Mineral activator of enzyme aconitase
is
A. Mn
в. Мв
c. ( mathrm{Fe} )
D. cu
11
12R.Q. of sprouting potato tubers is
( A )
B. ( 1 )
D.
11
13Buchner was successful in extracting a respiratory enzyme complex
A. ATP
B. NADH
c. zymase
D. Mitochondria
11
14Oxidative phosphorylation is the
formation of
A. NADPH ( _{2} ) in respiration
B. ATP in respiration
c. NADPH ( _{2} ) in photosynthesis
D. ATP in photosynthesis
11
15Mitochondria is the site of
A. ( C O_{2} ) uptake in photosynthesis
B. ( O_{2} ) uptake during respiration
C. The release of energy during respiration
D. Cell division
11
16Explain electron transport system11
17Which of the following involves the loss of two protons and two electrons?
A. Deamination
B. Dehydrogenation
c. carboxylation
D. None of the above
11
18In hexose monophosphate shunt, the
number of ( C O_{2} ) molecules evolved is
A. Same as in glycolysis
B. Less than glycolysis
c. More than glycolysis
D. Much lesser than the glycolysiss
11
19Which is the wrong statement from the
following?
A. When tripalmitin is used as a substrate in respiration, the R.Q. is 0.7
B. The intermediate compound which links glycolysis with Kreb’s cycle is malic acid.
C. One glucose molecule yields a net gain of 36 ATP molecules during aerobic respiration.
D. One glucose molecule yields a net gain of 2 ATP molecules during fermentation.
E. The scheme of glycolysis was given by Embden, Meyerhof and Parnas.
11
20Which one of the following hormone never reaches to cytoplasm?
A. Estrogen
B. FSH
c. Progesterone
D. Testosterone
11
21Substrate level phosphorylation is seen which of these phases?
A. Glycolysis & ETS
B. ETS & TCA cycle
c. HSK pathway & Krebs cycle
D. TCA cycle
11
22Common enzyme in glycolysis and pentose phosphate pathway is
A. Hexokinase
B. Aconitase
c. Fumarase
D. Dehydrogenase
11
23Which of the given enzyme is not concerned with the irreversible reaction
of glycolytic pathway?
A. Phosphofructo kinase
B. Hexokinase
c. Triose phosphate mutase
D. Pyruvate kinase
11
24ATP molecules produced respectively by
( N A D Hleft(H^{+}right) ) and ( F A D H_{2} ) during
electron transport are
A. 3 and 2
B. 1 and 1
( c cdot 2 ) and3
D. 3 and 3
11
25Which one of these is an oxidative
process?
A. Addition of oxygen
B. Removal of electrons
C. Removal of ( H^{+} ) ions
D. All of the above
11
26TCA cycle is named after
( A ). Embden
B. Emerson
c. Krebs
D. Calvin
11
27Cytochromes are concerned with which of the following processes?
A. Protein synthesis
B. Cellular digestion
c. Cell division
D. cellular respiration
11
28Which process produces alcohol or
lactate?
A. Krebs cycle
B. Glycolysis
C. Electron transport system
D. Fermentation
11
29Which of the following statements
regarding metabolic pathways is incorrect?
A. Many of the steps of glycolysis can run in reverse
B. Starch, sucrose or glycogen must be hydrolysed before it can enter the glycolysis.
C. After fats are digested, glycerol enters glycolysis by forming DHAP.
D. After fat digestion, fatty acids can no longer participate in cellular respiration.
11
30Categories the given equations under
respective phases and select the
correct option.
[
begin{array}{r}
text { “I. } C_{6} mathrm{H}_{12} mathrm{O}_{6}+2 mathrm{NAD}^{+}+2 mathrm{ADP}+2 mathrm{Pi} rightarrow \
qquad 2 mathrm{C}_{3} mathrm{H}_{4} mathrm{O}_{3}+2 mathrm{ATP}+2 mathrm{NADH}+2 mathrm{H}^{+}
end{array}
]
Il. Pyruvic acid + ( 4 mathrm{NAD}^{+}+mathrm{FAD}^{+}+2 mathrm{H}_{2} mathrm{O}+mathrm{ADP}+mathrm{Pi} rightarrow )
[
3 mathrm{CO}_{2}+4 mathrm{NADH}+4 mathrm{H}^{+}+mathrm{ATP}+mathrm{FADH}_{2}
]
A. I-Glycolysis ; II-Fermentation ; III-Krebs’ cycle
B. I-Krebs’ cycle ; II – Fermentation ; III -Glycolysis
C. I-Krebs’ cycle ;II- Glycolysis ; III- Fermentation
D. I- Glycolysis ; II- Krebs’ cycle ; III-Fermentation
11
31Who is credited with study of external respiration for the first time?
A. Dutrochet
B. Pasteur
c. cruickshank
D. Lavosier
11
32Coenzyme A helps in
A. Oxidative phosphorylation
B. Substrate level phosphorylation
C. Breakdown of pyruvate
D. Activation of acetyl group
11
33The reactions of Kreb’s/citric acid cycle
take place
A. In the cytoplasm
B. In ER
c. In matrix of mitochondria
D. on the surface of mitochondria
11
34Which one is the last electron acceptor
over ETC in oxidative phosphorylation?
A ( . H_{2} )
B. ( C y t a_{3} )
c. cyt b
D. ( C O_{2} )
11
35Respiratory Pathway is
A. Catabolic
B. Amphibolic
C. Anabolic
D. Endergonic
11
36In alcoholic fermentation, ( mathrm{CO}_{2} ) is evolved
during
A. Decarboxylation of pyruvic acid
B. Formation of acetaldehyde
c. Oxidation of acetaldehyde
D. Both A and B
11
37Which is wrong about Krebs cycle?
A. It occurs in mitochondria
B. It starts with 6 carbon compound.
c. It is also called citric acid cycle
D. Glycolysis is linked to it through malic acid
11
38All enzymes of TCA cycle are located in the mitochondrial matrix except one which is located in inner mitochondrial
membranes in eukaryotes and in the cytosol in prokaryotes. This enzyme is
A. Lactate dehydrogenase
B. Isocitrate dehydrogenase
C. Malate dehydrogenase
D. succinate dehydrogenase
11
39Short / Long Answer Types:
What is the relationship between the
Krebs cycle and electron transport chain?
11
40The commonest living organism, which
can respire in the absence of ( O_{2} ) is
A . Fish
B. Yeast
c. Potato
D. Chlorella
11
41R.Q. İs measured by
A. Mercury manometer
B. Respirometer.
c. Auxanometer.
D. Calorimeter.
11
42In Kreb’s cycle, OAA accepts acetyl CoA
to form
A . Citric acid
B. Oxalosuccinate
c. Fumarate
D. succinyl CoA
11
43Both ATP and ( M g^{2+} ) are involved in the
activity of
A. Pyruvic Kinase
B. Glucokinase
c. Phosphogluco isomerase
D. PGA dehydrogenase
11
44Amongst 38 ATP, 34 ATP are derived
from
A. HMP
B. Krebs cycle
c. Glycolosis
D. Electron chain transport
11
45Which one is the first compound which is common for both glucose and fructose in glycolysis?
A. Fructose ( 6- ) –
B. Glucose 6-P
c. Fructose 1, 6-biphosphate
D. Fructose 1-P
11
46Select the correct statement –
A. When ATP is synthesised directly from metabolites, it is substrate level phosphorylation.
B. In Krebs’ cycle, citrate undergoes 2 decarboxylations and 4 dehydrogenations.
C. Krebs’ cycle is an amphibolic process
D. All of these
11
47The number of water molecules formed
when ten electrons move from
mitochondrial NADH molecules through
the components of electron transport system to molecular oxygen is
A . 20
B. 15
c. 10
D. 5
11
48Membrane bound Krebs cycle enzyme is
A. Fumarase
B. Cis-aconitase
c. succinic dehydrogenase
D. Malate dehydrogenase
11
49An example for Pasteur effect can be
found in
A. Nostoç
B. Saccharomyces
c. Pinnularia
D. Penicillium
11
50RQ of which diet is less than unit?
A. carbohydrate
B. Fats
c. organic acid
D. Sugar
11
51The chief enzyme found in yeast cells is
A. Invertase
B. Maltase.
c. zymase.
D. Amylase.
11
52Very Short Answer Types:
Name three steps of aerobic respiration
11
53The number of glucose molecules required to produce 38 ATP molecules under anaerobic conditions by a yeast
cell are
( A cdot 2 )
B. 4
c. 19
D. 25
E. 38
11
54Which of the following is not formed during glycolysis?
A. Pyruvate
B. NADH
c. АтР
D. FADH
11
5548. Rate of photosynthesis is maxi-
mum in :
(1) Red light (2) Blue light
(3) Green light (4) None
11
56In succulent plants R.Q. is less than one because of
A. Complete oxidation
B. Complete reduction
c. Incomplete reduction
D. Incomplete oxidation
11
57What is the normal percentage composition of gases in the inspired air and expired air respectively?11
58In alcoholic fermentation, two
molecules of glucose produce ethano
and ( mathrm{CO}_{2} ) respectively
( A cdot 2+2 )
B. ( 3+3 )
( c cdot 4+4 )
( D cdot 6+6 )
11
59In TCA during the conversion of succinic acid to fumaric acid how many ATP are produced?
( A cdot 2 )
B. 14
( c cdot 6 )
D. 10
11
60The time taken from the fixation of ( C O_{2} )
to the formation of one glucose molecule is about
seconds.
A . 20
B. 40
c. 60
D. 90
11
61Short / Long Answer Types:
What is fermentation and how does it
differ from glycolysis? Mention the benefit of pyruvate reduction during fermentation. What types of organisms carry out lactate fermentation, and
what types carry out alcoholic fermentation?
11
62How many molecules of oxygen are used during the glycolysis of one glucose molecule?
( A cdot 2 )
B. 32
( c cdot 38 )
D. zero
11
63Fermentation by yeast produces
I. Carbon dioxide
II. Oxygen
III. Water
IV. Alcohol
A. I only
B. I and II
c. ।, ॥ and III
D. I, III and IV
E . I and IV
11
64Fill in the blanks with the appropriate
words.
The net result of glycolysis of one glucose molecule is the. formation
of ( ldots ldots ldots . ) NADH and ( ldots ldots . . . . ) ATP
11
65During anaerobic respiration the conversion of pyruvate into acetaldehyde, along with co-enzyme TPP, the cofactor required is
A. ( M g^{++} )
B. ( M n^{++} )
( mathbf{c} cdot F e^{++} )
D. ( Z n^{++} )
11
66Electron transport chain occurs on:
A. Outer membrane of mitochondria
B. Inner membrane of mitochondria
c. Matrix of mitochondria
D. None of the above
11
67( mathbf{2} C_{51} boldsymbol{H}_{98} boldsymbol{O}_{6}+mathbf{1 4 6} boldsymbol{O}_{2} rightarrow mathbf{1 0 2} boldsymbol{C O}_{2}+mathbf{9 8} boldsymbol{H} )
the R.Q for the above reaction is
A. 0.7
в.
c. ( 1-45 )
D. 1-62
11
68The energy releasing process in which the substrate is oxidised without an
external electron acceptor is called as
A. Aerobic respiration
B. Glycolysis.
C. Fermentation.
D. Photorespiration.
11
69The process of glycolysis can be
represented as
A. ( C_{6} H_{12} O_{6} rightarrow 2 C_{3} H_{4} O_{3}+4 H )
B. ( C_{6} H_{12} O_{6}+6 C O_{2} rightarrow 6 C O_{2}+6 H_{2} O )
( mathrm{c} cdot 6 H_{2} O+6 C O_{2} rightarrow C_{6} H_{12} O_{6}+6 O_{2} )
D. None of the above
11
70Decarboxylation occurs during
A. Glycolysis.
B. ETS
c. Krebs cycle.
D. All the above.
11
71Two names referring to 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.
11
72Find the incorrect match (with respect
to ATP gain) –
A. Bacterial cell – 38 ATP or 2 ATp
B. Citric Acid Cycle – 12 ATP
c. Nerve cell – 38 ATP
D. Liver cell – 38 ATP
11
73Describe the connecting link reaction between glycolysis and Kreb’s cycle.11
74Link between glycolysis, Krebs cycle and beta-oxidation of fatty acid is
A. Pyruvic acid
B. Acetyl CoA
c. Acetaldehyde
D. Citric acid
11
75Which of the following substances yield less than 4 Kcal/mol when its
phosphate bond is hydrolysed?
A. Creatine phosphate
B. ADP
c. Glucose-6-phosphate
D. ATP
11
76A scientist took 8 molecules of cytosoic aldolase into an enzyme reaction mixture to study its activity. After ten minutes of enzyme reaction, ( 60 % ) of its
substrate was found converted into
2400 molecules of products. Then what is the TON of aldolase and number of
substrate molecules left over in the
reaction mixture?
A . 30,1440
B. 30,960
( c .15,1280 )
D. 15,800
11
77When one glucose molecule is
completely oxidised, it changes
A. 36 ADP molecules into 36 ATP molecules
B. 38 ADP molecules into 38 ATP molecules
C. 30 ADP molecules into 30 ATP molecules
D. 32 ADP molecules into 32 ATP molecules
11
78An enzyme absent in mitochondrial ETS
is
A. FeS protease
B. Glucose 6-phosphate dehydrogenase
c. NADH dehydrogenase
D. cytochrome c-oxidase
11
79The incomplete breakdown of sugars in anaerobic respiration forms
A. Fructose and water.
B. Glucose and ( C O_{2} )
c. Alcohol and ( C O_{2} )
D. water and ( C O_{2} ).
11
80Carbon dioxide is used in the
production of three carbon sugar by which of the following method?
A. Photosystem-I
B. Photosystem-II
c. Electron transport chain
D. Calvin cycle
E . citric acid cycle
11
81Phosphoglyceraldehyde and dihydroxy acetone phosphate are
A. Isomers
B. Polymers
c. Tautomers
D. Synonyms
11
82In which one of the following, the two names refer to one and the same thing?
A. Tricarboxylic acid cycle and urea cycle
B. Krebs cycle and Calvin cycle
c. Tricarboxylic acid cycle and citric acid cycle
D. Citric acid cycle and Calvin cycle
11
83Describe the formation of
Acetyl Coenzyme A
11
84How many ATPs are required by ( boldsymbol{C}_{4} ) plants in synthesis of one molecule of glucose
A . 18 ATP
в. 30 АтР
c. 12 Атр
D. None of the above
11
85Which of the following is the first step of glycolysis?
A. Breakdown of glucose
B. Phosphorylation of glucose
c. conversion of glucose into fructose
D. Dehydrogenation of glucose
11
86Fermentation is represented by the
equation
A ( cdot C_{6} H_{12} O_{6}+6 O_{2} stackrel{text {light}}{rightarrow} 6 C O_{2}+H_{2} O+673 k c a l )
B . ( C_{6} H_{12} O_{6}+rightarrow 2 C_{2} H_{5} O H+2 C O_{2}+18 k c a l )
c. ( 6 C O_{2}+12 H_{2} O stackrel{text { Chlorophyll }}{longrightarrow} C_{6} H_{12} O_{6}+6 H_{2} O+6 O_{2} )
D. ( 6 C O_{2}+6 H_{2} O rightarrow C_{6} H_{12} O_{6}+6 O_{2} )
11
87Choose the correct answers from the
alternatives given :
Which of these pairs of processes are
anaerobic?
A. Fermentation and glycolysis
B. Fermentation and the Krebs cycle
c. Glycolysis and the Krebs cycle
D. The Krebs cycle and the electron transport system
11
88RQ of sprouting potato is
( A )
B. >
( c cdot c )
D. zero
11
89Select the correct option:
During electron transport system(ETS), electron transport proceeds from carriers that have
potential to those having redox potential. This electron transport down the energy gradient leads to the formation of ATP from ADP and Pi, which
is referred to as
A. Low, high, oxidative phosphorylation
B. Low, high, oxidative decarboxylation
c. High, low, oxidative phosphorylation
D. High, low, oxidative decarboxylation
11
90In animal cells, the first stage of glucose breakdown is
A. Krebs cycle
B. Glycolysis
c. Oxidative phosphorylation
D. Electron transport chain
11
91Short / Long Answer Types:
What are the three pathways involved in the complete breakdown of glucose to
carbon dioxide ( left(C O_{2}right) ) and water ( left(H_{2} Oright) )
? What reaction is needed to join two of
these pathways?
11
92Where does electron transport system operates in moitochondria? Explain.11
93The respiratory quotient of carbohydrate is
A. Unity.
B. Greater than unity
c. Less than unity.
D. Equal to five
11
94After glycolysis, the fate of glucose in mitochondrial matrix is
A. Oxidation.
B. Reduction.
c. Oxidative decarboxylation.
D. Hydrolysis.
11
95Fermentation of lactic acid does not
form
A. ATP
в. ( C O_{2} )
c. NADH
D. NADH and ( C O_{2} )
11
96Which of the following are isomers?
A . 3 PGA and 2 PGA
B. PGAL and DHAP
c. Glucose and Fructose
D. All of these
11
97FAD participates in Krebs’ cycle as electron acceptor during conversion of
A. succinyl CoA to succinic acid
B. ( alpha ) -ketoglutarate to succinyl CoA
c. succinic acid to fumaric acid
D. fumaric acid to malic acid
11
98Pasteur’s effect is
A. Stoppage of fermentation in the presence of oxygen
B. Increase of fermentation in the presence of oxygen
C. Decrease of fermentation in the presence of oxygen
D. No effect on fermentation
11
99A test tube containing molasses solution and yeast is kept in a warm
place overnight. The gas collected from this mixture
A. Extinguishes the flame
B. Bursts into flame when ignited
c. Turns lime water milky
D. Both (a) and (c)
11
100When a molecule of pyruvic acid is subjected to anaerobic oxidation and forms lactic acid, it lead to formation of
( A cdot N A D+ )
B. NADH
c. oxygen
D. None of the above
11
101Choose the correct answers from the
alternatives given :
Which of these is not true
of fermentation?
A. Net gain of only two ATP
B. Occurs in cytosol
C. NADH donates electrons to electron transport systemmmen
D. Begins with glucose
11
102Assertion
Respiratory pathway is an amphibolic pathway.
Reason
In respiration there is breakdown of many substance (catabolism) and
synthesis of many substance (anabolism) by respiratory intermediates.
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
103When a molecule of pyruvic acid is subjected to anaerobic oxidation and forms lactic acid, these are:
A. Loss of 3 ATP molecules
B. Loss of 6 ATP molecules
c. Gain of 2 ATP molecules
D. Gain of 4 ATP molecules
11
104Glycolysis (EMP Pathway) takes place in
A. Mitochondria
B. Cytoplasm
c. Both mitochondria and cytoplasm
D. vacuole
11
105In the anaerobic process of glycolysis, energy is released from ATP is used to
A. phosphorylate glucose
B. Phosphorylate ADP
c. Move glucose into the Calvin cycle.
D. Carry ATP to the electron transport chain
11
106Read the given statements and select
the correct option.
Statement 1: Glycolysis occurs in mitochondrial matrix.
Statement 2: Kerbs’ cycle occurs on
cristae of mitochondria.
A. Both statements 1 and 2 are correct
B. Statement 1 is correct but statement 2 incorrect
c. statement 1 is incorrect but statement 2 correct
D. Both statements 1 and 2 are incorrect
11
107When one molecule of glucose undergoes glycolysis aerobically, last stable product will be
A. One pyruvic acid
B. Two pyruvic acid
c. Three pyruvic acid
D. Four pyruvic acid
11
108Which is the site of cellular respiration in prokaryotes?
A. Mitochondrion
B. Plasmids
c. Plasma membrane
D. cytosol
11
109Cytochrome ( c ) is a small protein found
attached to outer surface of inner
mitochondrial membrane. It is a mobile
electron carrier that transfers electrons
between.
A. Complex II and III
B. Complex II and IV
c. Complex III and IV
D. Complex land!
11
110In EMP pathway,ATP is directly formed in the conversion of
I)Fructose 1,6 -bisphosphate to glyceraldehyde -3-phosphate II)Phosphoenolpyruvate to pyruvate acid
III)1 ( , 3 ) -bisphosphoglyceric acid to 3 phosphoglyceric acid IV)3-phosphoglyceric acid to 2phosphoglyceric acid The correct combination is
A . IV,
B. ॥ , Iv
c. ॥ा,॥
D. ।.”|
11
111Which one of the following reactions is an example of oxidative decarboxylation?
A. Conversion of succinate to fumarate.
B. Conversion of fumarate to malate
C. Conversion of pyruvate to acetyl Co-A
D. Conversion of citrate to isocitrate
11
112Exchange of gases takes place through
the
A. Wall of trachea and blood capillaries
B. Wall of alveoli and blood capillaries
C. Wall of pleura and diaphragm
D. Wall of alveoli and bronchioles
11
113In mitochondrion, the proton gradient required for ATP synthesis develops
across
A. Inner membrane
B. Inter membrane space
c. Outer membrane
D. ( F_{0}-F_{1} ) particles
11
114During Krebs cycle, energy from glucose is mostly transferred to
A. NADH and FADH
B. NADPH
c. ADP
D. water
11
115During fermentation alcohol is formed from
A. Sugar
B. Protein
c. carbon dioxide and water
D. None of the above
11
116Ethyl alcohol fermentation occurs in
A. Lactobacillus
B. Muscles of Humans
c. Rhizopus
D. All of these
11
117The details of tricarboxylic acid pathway was worked out by
A. Miescher
B. Hans Krebs
c. Pasteur
D. None of the above
11
118How many carbon atoms are present in citric acid?
( A cdot 8 )
B. 6
c. 10
( D )
11
119Match the following columns.
Column Column I n II
1. ( alpha )
( A )
Molecular roxygen ketoglutaric acid
B. Electron acceptor
2. Hydrogen acceptor
C. Pyruvate
3. Cytochrome-C dehydrogenase
D. Decarboxylation
4. Acetyl Co-A
( mathbf{A} cdot 2,3,4,1 )
( mathbf{B} cdot 3,4,2,1 )
( mathrm{C} cdot 2,1,3,4 )
D. 4,3,1,2
11
120Pyruvate (pyruvic acid) dehydrogenase is used in converting
A. Pyruvate to glucose
B. Glucose to pyruvate
c. Pyruvic acid to lactic acid
D. Pyruvate to acetyl CoA
11
121Choose the correct answers from the
alternatives given :
In certain organisms and under certain conditions, which of the following can be used as an energy alternative to glucose
A. fatty acids
B. glycerol
c. amino acids
D. all of these
11
122During aerobic respiration maximum ATP is synthesized by
A . ETS
B. Kreb’s cycle
c. Glycolysis
D. Fermentation
11
123The last or terminal cytochrome in respiratory chain is
A. cyt b
B. Cyt ( a_{3} )
c. cyt a
D. cytc
11
124Upon oxidation of one molecule of
pyruvate by mitochondria, the number of ATP generated are
A . 38
B. 30
( c cdot 8 )
D. 15
11
125The end product of fermentation of
sugars by Lactobacillus bacteria is
A . Lactic acid
в. ( C O_{2} )
C. Methyl alcohol and ( C O_{2} )
D. Butyl alcohol.
11
126Enzyme required to oxidise
acetaldehyde is
A. Ethanol oxidase
B. Acetaldehyde dehydrogenase
C. Alcohol hydrogenase
D. Glyceraldehyde dehyadrogenase
11
127Fermentation refers to
A. Anaerobic respiration
B. Incomplete oxidation of carbohydrate
C. Complete oxidation of carbohydrate
D. Both A and B
11
128Which of the following statements is/are true?
(a) One ATP molecule yields ( 30-32 ) kJ of
energy.
(b) Pentose phosphate pathway was discovered by Dickens.
(c) When tripalmitin is used as a substance, the R.Q is 0.9
(d) Energy released by one molecule of glucose on complete oxidation corresponds to about ( 1292 mathrm{kJ} )
( A ). a and b only
B. c and donly
c. a and donly
D. a, c and donly
E. conly
11
129Inner mitochondrial membrane allows
the passage of
A. Glucose
B. Pyruvate
c. NADH
D. oxaloacetate
11
130In how many steps, ( C O_{2} ) is released in aerobic respiration of pyruvic acid?
A. one
B. Six
c. Three
D. Twelve
11
131When a molecule of pyruvic acid is subjected to anaerobic oxidation and forms lactic acid, there is
A. Loss of 3 ATP molecules
B. Loss of 6 ATP molecules
c. Gain of 2 ATP molecules
D. Gain of 4 ATP molecules
11
132Which of the following is an end product of citric acid cycle?
A . Citric acid
B. Lactic acid
c. Pyruvic acid
D. carbon dioxide
11
133In which one of the following steps of citric acid cycle, FAD is reduced to ( $ $ mathrm{FADH}_{-} 2 $ $ )
A. Pyruvate Acetyl CoA
B. Succinic acid Malic acid
c. Malic acid Oxalosuccinic acid
D. Citric acid-Ketoglutaric acid
E. -Ketoglutasic Succinic acid
11
134Name the first organic acid produced by microbial fermentation.11
135Krebs cycle begins with
A . Citric acid
B. Pyruvic acid
c. Malic acid.
D. Hydrochloric acid.
11
136Number of cytochrome molecules
required for the transfer of ( 2 e^{-} ) in ETS is
A. 2
B. 4
( c cdot 1 )
D. 10
11
137Component of ETC of mitochondria is
A. Carotenoids
B. Plastocyanin
c. Phytochrome
D. Cytochrome oxidase
11
138During glycolysis, fructose 1,6 biphosphate is split into
A. Dihydroxyacetone phosphate and 2 phosphoglyceraldehyde
B. Dihydroxyacetone phosphate and 1 phosphoglyceraldehyde
c. Dihydroxyacetone phosphate and 4 phosphoglyceraldehyde
D. Dihydroxyacetone phosphate and 3phosphoglyceraldehyde
11
139What is common in common pathway of
aerobic respiration
A. Glycolysis in both aerobic and anaerobic respiration
B. Krebs cycle common with HMP
C. Terminal oxidation in both aerobic and anaerobic respiration
D. Krebs cycle in both aerobic and anaerobic respiration
11
140In the absence of oxygen, plants will
break down sugars into carbon dioxide
and alcohols or acids. This pathway likely arose
A. To get the most out phosphorylation per molecule of pyruvate without the ability to utilize respiration
B. As an alternative process to compete with respiration
c. To regenerate depleted NAD ( ^{+} )
D. Because of human cultivation
11
141The energy of ATP in Glycolysis is used
for
A. Oxidative phosphorylation.
B. Substrate level phosphorylation.
c. The dephosphorylation of ADP.
D. Pyruvate.
11
142During fermentation what does not
occurs
A. Oxidation of glucose into pyruvate
B. Substrate level phosphorylation
c. oxidation of ( N A D H_{2} )
D. Oxidative phosphorylation.
11
143Which of these steps in krebs’ cycle indicates substrate level
phosphorylation?
A. Conversion of succunic acid to a-ketoglutaric acid
B. Conversion of succunic acid to malic acid
c. conversion of succunyl CoA to succunic acid
D. Conversion of malic acid to oxaloacetic acid
11
144Enzyme encolase catalyses the
conversion of 2 PGA to phosphoenol pyruvic acid in presence of which is the
cofactor.
( mathbf{A} cdot M n^{+} )
B. ( F e^{++} )
c. ( M g^{++} )
D. ( Z n^{+} )
11
145The number of ATP molecules produced by the electron transport system from Krebs cycle intermediates in a single turn is
A . 11
B. 14.
c. 12
D. 16
11
146Select the correct option:Fermentation
is represented by the equation
( mathbf{A} cdot C_{6} H_{12} O_{6}+6 O_{2} rightarrow 6 C O_{2}+6 H_{2} O+686 K c a l )
B ( cdot C_{6} H_{12} O_{6} rightarrow 2 C_{2} H_{5} O H+2 C O_{2}+59 K c a l )
( mathbf{c} cdot 6 C O_{2}+12 H_{2} O frac{text {Light}}{text {Chlorophyll}} C_{6} H_{12} O_{6}+6 H_{2} O+6 O_{2} )
D. ( 6 C O_{2}+6 H_{2} O rightarrow C_{6} H_{12} O_{6}+6 O_{2} )
11
147Enzymes of oxidative phosphorylation
occur in
A. Endoplasmic reticulum
B. Chloroplasts
c. Mitochondria
D. Golgi apparatus
11
148Match the above lists and choose the
correct option.
( A cdot A-2, B-3, C-4, D-1 )
B. ( A-3, B-2, C-4, D-1 )
( C cdot A-2, B-4, C-3, D-1 )
D. ( A-2, B-3, C-1, D-4 )
11
149The enzyme of yeast which converts glucose into ethyl alcohol is called as
A. Diastase
B. Invertase
c. zymase
D. Maltase
11
150R.Q. of anaerobic respiration is
A. zero
B. Less than 1
( c cdot 1 )
D. More than 1
11
151For bacteria to continue growing rapidly when they are shifted from an
environment containing ( boldsymbol{O}_{2} ) to an
anaerobic environment, they must
A. Produce more ATP per mole of glucose during glycolysis
B. Produce ATP during oxidation of glucose
c. Increase the rate of glycolysis
D. Increase the rate of TCA cycle
11
152An important requirement of
fermentation is
A. Oxygen
B. Zymase
c. ( mathrm{Fe} )
( D cdot c O_{2} )
11
153During the production of bread, it becomes porous due to the release of
( C O_{2} ) formed by the action of
A. Yeast
B. Bacteria.
c. virus.
D. Protozoa.
11
154R.Q. is more than one in the case of
A. Fat
B. Fructose
c. Glucose
D. organic acid
11
155Breathing by ribs is more pronounced in
A. Male
B. Female
c. Pregnant female
D. None of the above
11
156Give the schematic representation of Glycolysis11
157The stage up to which glycolysis and fermentation have a common pathway is
A. Dihydroxyacetone.
B. 3-phosphoglyceradehyde
c. Pyruvate.
D. Glucose-6-phosphate.
11
158The enzyme which converts glucose to
glucose- 6 -phosphate is
A. Phosphorylase
B. Glucose phosphorylase
c. Hexokinase
D. Phosphoglucomutase
11
159Which one is not correct about Krebs
cycle?
A. It is also called citric acid cycle.
B. The intermediate compound which links glycolysis with Krebs cycle is malic acid.
C. It occurs in mitochondria.
D. It start with six carbon compound.
11
160The overall goal of glycolysis, Krebs cycle and the electron transport system is the formation of
A. ATP in small stepwise reactions
B. ATP in one large oxidation reaction
c. sugars
D. Nucleic acid
11
161Site of glycolysis or EMP is
A. Mitochondria
B. Cytoplasm
( c . ) E.R
D. Ribosomes
11
162Select suitable name for the process
( mathrm{C}_{6} mathrm{H}_{12} mathrm{O}_{6}+2 mathrm{ADP}+mathrm{Pi} 2 mathrm{C}_{2} mathrm{H}_{5} mathrm{OH}+mathrm{CO}_{2}+ )
2ATP
A. Photorespiration.
B. Lactate fermentation
c. Aerobic respiration
D. Alcoholic fermentation
11
163Anaerobic respiration occurs in human
body inside
A. Liver
B. Kidneys
c. Red muscles
D. White muscles
11
164Match the terms to these definitions.
Fermentation, glycolysis, Krebs cycle, chemiosmosis, acetyl Co A electron transport system, ATP cellular respiration, oxidative phosphorylation, photophosphorylation, combustion. Anaerobic breakdown of glucose that results in a gain of two ATP and end products such as alcohol and lactate.
11
165Explain the reactions involved in glycolysis. (flowchart or explanation)11
166Aerobic cellular respiration has three
stages, and
11
167In anaerobic respiration, the number of
ATP molecules produced is equal to
A . 1
в. 2.
( c cdot 3 )
( D cdot 8 )
11
168Which of the following is correct about
fermentation?
A. Bread gets fermented due to formation of lactic acid.
B. Pulled up appearance of dough is due to production of ( C O_{2} )
C. Fermentation in muscles produces alcohol
D. Both A and B
11
169EMP is also known as
A . Glycolysis
B. Krebs cycle.
c. ЕTS
D. Fermentation.
11
170conversion of glucose into ethanol, a
key process of anaerobic energy
transformation in some organisms.
The best explanation for this is that
A. Step 1 illustrates that ATP hydrolysis is an energetically favorable exergonic reaction that couples the free energy released when ATP forms ADP and Pi (inorganic phosphate) with the endergonic conversion of glucose into pyruvate.
B. NADH is oxidized during step 1 and reduced during step
3
c. Step 1 illustrates the phosphorylation of ADP into ATP, which is coupled to the energetically favorable conversion of glucose into pyruvate
D. In step 1 ATP is oxidized and glucose is reduced, and it is this coupling that provides the energy to drive ethanol production
11
171Assertion
Respiratory pathway is considered as an amphibolic pathway.
Reason
It involves both anabolism and
catabolism.
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
172The first phase in the breakdown of glucose in animals cells is
A. Krebs cycle
B. Glycolysis
c. Electrons transport system
D. Lipid biosynthesis
11
173Who contributed to the research
process on fermentation?
A. Johannes Miller
B. Matthias Jakob
c. Robert Brown
D. Schwann Theodor
11
174In Krebs cycle, second decarboxylation
occurs during
A. Pyruvate Acetyl CoA
B. – -Ketoglutarate Succinyl CoA
c. oxalosuccinic acid-Ketoglutarate
D. Malic acid Fumaric acid
11
175Choose the correct answers from the
alternatives given :
Glycolysis starts and ends m the
A. cytoplasm
B. plasma membrane
c. nucleus
D. mitochondrion
11
176Oxidation of glyceraldehyde phosphate is accompanied by
A. oxidation of ( N A D^{text {th }} )
B. Substrate level phosphorylation
c. Reduction of ( N A D^{+} )
D. Oxidative phosphorylation
11
177Glycolysis cannot occur in absence of
A. ( C a )
в. ( M n )
c. ( M g )
D. ( C o )
11
178Fermentation is an
A. Aerobic respiration
B. Incomplete oxidation
c. Excretory process
D. None of the above
11
179Which of the following substances yield less than ( 4 K c a l / ) mol, when its
phosphate bond is hydrolysed?
A. Creatine phosphate
B. ADP
c. Glucose-6-phosphate
D. ATP
11
180Mobile electrons carriers in ETS in
mitochondrial membrane are
A. ( P Q, P C )
в. ( C o Q, C y t c )
c. ( P Q, ) Cyt ( c )
D. ( P C, C o Q )
11
181Which of the following is incorrect for
glycolysis?
A. It produces ATP
B. It uses ATP
c. End products are ( mathrm{CO}_{2} ) and ( mathrm{H}_{2} ) 0
D. None of the above
11
182The respiratory quotient (RQ) of carbohydrate is
A. Equal to 1
B. Less than 1
c. More than 1
D. None of the above
11
183( boldsymbol{F}_{1} ) particle of oxysome
A. Releases proton energy
B. Utilises proton energy
C. Has no role in energy consumption
D. Lies in outer chamber
11
184Cyanide resistant pathway is
A. Anaerobic respiration
B. Aerobic respiration
C. Both (A) and (B)
D. None of these
11
185The number of photons required to
release one mole of ( boldsymbol{O}_{2} ) in
photosynthesis is called as
A. Quantum yield
B. Quantum requirement
c. Red drop
D. Emerson’s effect
11
186Alcoholic fermentation is carried out by
A. Saccharomyces.
B. Lactobacillus.
c. clostridium.
D. Aspergillus
11
187Ethyl alcohol fermentation can be
observed in
A. Rhizopus
B. Lactobacillus
c. Mesophyll cell
11
188Which of the following is produced during Krebs cycle?
A . Citric acid
B. Lactic acid
c. Acetyl coenzyme A
D. Acetic acid
11
189Mitochondria are sites of
A. Oxidative phosphorylation
B. Photolysis
C. Phosphorylation
D. Starch synthesis.
11
190ATP is produced during which of the following processes?
I. Photosynthesis
Il. Aerobic respiration
III. Fermentation
A. I only
B. II only
c. I and III only
D. Il and III only
E. I, II and III
11
191Pacemaker enzyme of EMP pathway is
A. Hexokinase
B. Pyruvate kinase
c. Enolase
D. Phosphofructokinase
11
192The intermediate product between ( alpha ) ketoglutaric acid and succinic acid in TCA cycle is
A . Acetyl CoA
B. succinyl CoA
c. Fumarate
D. Oxalosuccinic acid
11
193How is RQ slightly more than unity?11
194The energy releasing metabolic process in which substrate is oxidised without
an external electron acceptor is
A. Fermentation
B. Aerobic respiration
c. Photorespiration
D. Glycolysis
11
195Which one of the following product is formed during glycolysis of glucose?
A. Pyruvic acid
B. Carbon dioxide
c. citric acid
D. Ethanol
11
196In respiration, pyruvic acid is
A. Formed only when oxygen is available.
B. One of the product of Krebs cycle
c. Broken down into Acetyl Co-A and ( C O_{2} ).
D. A result of protein break down
11
197During amphibolic pathway, acetyl Co-A can perform the biosynthesis of
A. Amino acid
B. Gibberellic acid
c. Fatty acid
D. All of the above
11
198Pyruvate kinase enzyme catalyses
A. First irreversible step of glycolysis
B. Second irreversible step of glycolysis
C. Third irreversible step of glycolysis
D. Fourth irreversible step of glycolysis
11
199Which of the following molecules is common to respiration mediated breakdown of major biomolecules?
A. AcetylCOA
B. Glucose 6-phosphate
c. Fructose 1, 6 – biphosphate
D. Pyruvic acid
11
200During lactic acid fermentation
A. ( O_{2} ) is used and ( C O_{2} ) is liberated
B. Neither ( O_{2} ) is used, nor ( C O_{2} ) is liberated
( mathrm{c} cdot O_{2} ) is used, but ( C O_{2} ) is not liberated
D. None of the above
11
201More ( mathrm{CO}_{2} ) is evolved than the volume
of oxygen consumed when the respiratory substrate is
A. Fat
B. Sucrose
c. Glucose
D. organic acid
11
202In alcoholic fermentation
A. Triose phosphate is the electron donor, while acetaldehyde is the electron acceptor
B. Triose phosphate is the electron donor, while pyruvic acid is the electron acceptor.
C. There is no electron donor.
D. Oxygen is the electron acceptor
11
203In order for glucose to be used as an energy source, it is necessary that
A. Glucose be formed from fructose
B. Glucose be degraded to ( mathrm{CO}_{2} )
c. 2 molecules of ATP be invested in the system
D. None of these
11
204The other name of glycolysis is
A. EMP-pathway
B. TCA-pathway
c. HMS-pathway
D. Carbon-pathway
11
205In Krebs cycle, malate hands over hydrogen to
( A cdot N A D^{+} )
B. FAD
c. FMN
D. Oxaloacetate
11
206The end products of fermentation when sugar is used as raw materials is/are
A. Alcohol and ( C O_{2} ).
B. Alcohol and pyruvate.
c. ( C O_{2} )
D. Alcohol.
11
207In mechanism, photophosphorylation is
very similar to
A. substrate-level phosphorylation
B. oxidative phosphorylation
c. calvin cycle
D. glycolysis
11
208toppr ‘OGIN
Q Type your question
A, D, , anu
A. A-Fructose-6-phosphate; B-Fructose-1,6-biphosphate;
C- 3-PGAL; D-1,3-biphosphoglyceric acid
B. A- Fructose -1,6-biphosphate ; B- 3-PGAL ; C-1,3biphosphoglyceric acid ; D-3 PGAL
C. A- 3PGAL; B-1,3 biophosphoglyceric acid ; C-3PGAL; Dse-1,6-biphosphate
D ( quad ) uctose -1,6 -biophosphate ; B-Fructose – ( 6- ) phosphate ; C-PGAL ; D-1,3- biphosphoglyceric acid
11
209Which one is a product of aerobic respiration?
A . Malic acid
B. Ethyl alcohol
c. Lactic acid
D. Acetic acid
11
210Decline in the activity of the enzyme hexokinase by Glucose-6-phosphate is caused by
A. Non-competitive
B. competitive modulators
c. Allosteric modulators
D. Denaturation of enzymes
E. Increased by substrate concentration
11
211Oxygen required for terminal oxidation enters mitochondria as
A. Glucose
B. Activated acetic group
c. oxygen gas
D. Pyruvic acid
11
212The enzyme involved in alcoholic
fermentation is
A. Pyruvate decarboxylase.
B. Alcohol dehydrogenase.
c. Lactate dehydrogenase.
D. Both A and B
11
213R.Q. of a germinating ground nut and castor seed is
A . 1
B. ( 1 )
D.
11
214Pyruvate undergoes oxidative decarboxylation to produce
A . 2-PGA.
B. ( alpha ) -Ketone
c. succinyl Co-A.
D. Acetyl Co-A
11
215Choose the odd one out in each of the
following groups of four items each:
Ethyl alcohol, Carbon dioxide, Starch,
Oxygen absence
11
216What is glycolysis? Sketch the pathway showing different stages in glycolysis.11
217How many ATP molecules will be produced in a brain cell (neuron) from a glucose molecule involving electron transport chain only?
A . 32
B. 16
( c cdot 38 )
D. 34
11
218Conversion of pyruvic acid into ethyl alcohol is facilitated by enzyme(s)
A. Carboxylase
B. Phosphatase
c. Dehydrogenase
D. Decarboxylase and dehydrogenase
11
219Choose the correct answers from the
alternatives given :
The greatest contributor of electrons to
the electron transport system is
A. oxygen
B. transition reaction
c. glycolysis
D. Krebs cycle
11
220Continuous addition of sugars in fed batch fermentation is done to
A. Degrade sewage
B. Produce methane
c. obtain antibiotics
D. Purify enzymes
11
221In Sedum, the R.Q at night is
A. Unity
B. More than unity
c. Less than unity
D. zero
11
222During anaerobic respiration in yeast
A. Water and ( C O_{2} ) are end products
в. ( C O_{2}, C_{2} H_{5} O H ) and energy are end products
C. ( H_{2} S, C_{6} H_{12} O_{6} ) and energy are the end products
D. ( H_{2} O, C O_{2} ) and energy are the only end products
11
223Assertion
Fermentation is called zymosis.
Reason
It is based on enzyme complex zymase.
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
224Which one is correct sequence in glycolysis?
A . G 6-Prightarrow PEPrightarrow3-PGAL ( rightarrow ) 3-PGA
B. G 6-Prightarrow 3-PGAL ( rightarrow 3 ) -PGA ( rightarrow ) 3-PEP
c. ( G 6-P rightarrow P E P rightarrow 3-P G A rightarrow 3-P G A L )
D. G 6-P ( rightarrow ) 3-PGA ( rightarrow ) 3-PGAL ( rightarrow ) 3-PEP
11
225End product of glycolysis is
A . Citric acid
B. Glyceraldehyde
c. Phosphoglyceraldehyde
D. Pyruvic acid
11
226Select the number of incorrect
statements for the process of fermentation.
A. It involves only partial breakdown of
glucose.
( mathrm{B} N A D H_{2} ) is oxidized to NAD by reduction of organic compound.
C. No ATP are produced during fermentation as it is extracellular
process in some microbes.
D. There is no ETS and Kreb’s cycle.
E. Maximum concentration of alcohol in
alcohol in alcoholic brevarage is ( 100 % )
( A cdot 2 )
B. 3
( c cdot 4 )
D. 5
11
227If the volume of ( C O_{2} ) liberated during
respiration is more than the volume of
( O_{2} ) used the respiratory substances will
be
A. Fats
B. organic acid
c. Proteins
D. Carbohydrate
11
228For complete phosphorylation of a glucose molecule, how many ATP molecules are required?
( A cdot 4 )
B. 2
( c cdot 6 )
D. 8
11
229What will be the metabolic fate of
pyruvic acid in absence of ( O_{2}: )
A. Partial oxidation will take place
B. Complete oxidation
c. Utilisation for reoxidation of NADH
D. Dependent on energy needd
11
230The anaerobic respiration is also called
as.
A. Fermentation
B. Fragmentation
c. oxidation
D. Reduction
11
231Pyruvic acid is formed during
A. Krebs cycle
B. Glycolysis.
c. ornithine cycle.
D. Calvin cycle.
11
232Oxidation of pyruvate is accompanied by
A . oxidation of ( N A D^{+} )
B. Reduction of ( N A D^{+} )
c. oxidation of CoA
D. Reduction of CoA
11
233Glycolysis process completes in what
part of the cell?
11
234Foul smell in the water of tanks, ponds
etc., is due to:
A. Anaerobiosis
B. Aerobiosis
c. Biological magnification
D. Psammophytes
11
235Choose the correct answers from the
alternatives given :
Substrate-level phosphorylation takes place in
A. Krebs cycle and the transition reaction
B. glycolysis and the electron transport system
c. electron transport system and the transition reaction
D. glycolysis and the Krebs cycle
11
236During glycolysis, the compounds PGAL and DHAP are formed from fructose 1,6
diphosphate by
A . Cleavage.
B. Isomerisation.
c. Phosphorylation.
D. Condensation
11
237In glycolysis pathway which of the following steps show reduction of ( c 0 ) enzyme?
A . 1,3 -diphosphoglycerate to 3 -phosphoglycerate
B. Glucose 6-phosphate to fructose 6-phosphate
c. Glyceraldehyde 3-phosphate to 1,3diphosphoglycerate
D. 3-phosphoglycerate to 2-phosphoglycerate
11
238What are respiratory substrates? Name
the most common respiratory
substrate.
11
239Choose the correct answers from the
alternatives given. The phosphate bonds of ATP are referred
to as high-energy bonds because their
A. Hydrolysis has a relatively high free energy of activation
B. Formation releases a relatively large amount of energy
c. Hydrolysis is exergonio
D. Bond energy is relatively highh
11
240Which one of the following contains copper besides iron?
A. cytochrome
B. Cytochrome oxidase
c. Plastoquinone
D. cytochrome ( c_{1} )
11
241Which is common in respiration and photosynthesis?
A. Oxidation
B. Phytochrome
c. cytochrome
D. Photosystem
11
242The end product of Krebs cycle is
A. Pyruvic acid
B. Citric acid
c. Malic acid.
D. Lactic acid.
11
243The importance of the Kreb’s cycle is
A. Production of amino acid
B. Production of vitamin
C. Production of ATP molecule through oxidative phosphorylation
D. ATP formation through oxidative and substrate level phosphorylation
11
244Rate limiting step in glycolysis is
A. Glucose to glucose 6 -phosphate
B. Fructose 6- phosphate to fructose 1,6-diphosphate
C. Glyceraldehydde -3 phosphate to 3-phosphoglyceric acid
D. Both A and B
11
245Explain the ways in which glucose is
broken down in absence of oxygen.
11
246Differentiate between Anaerobic
Respiration and Fermentation:
11
247Anaerobic respiration, that occurs after glycolysis is also called as
A. Fermentation.
B. Fragmentation.
c. Restoration.
D. Multiplication.
11
248Removal of water molecule from the
substrate is called
A. Enolation
B. Phosphorylation
c. Decarboxylation
D. Oxidation
11
249Anaerobic respiration is
A. Complete oxidation
B. Incomplete oxidation
c. Anabolic reaction
D. Fermentation
11
250Decarboxylation is involved in the
A. Electron transport system
B. Glycolysis
c. Krebs cycle
D. Lactic acid fermentation
11
251Which is not true for glycolysis?
A. End product is ( C O_{2} ) and ( H_{2} O )
B. Substrate level phosphorylation
c. Production of ATP
D. Expenditure of ATP
11
252Enzyme alternate oxidase is inhibited by
( A ). NADP
B. SHAM (Salicyl hydroxamic acid)
c. Both A and B
D. None of these
11
253Choose the correct answers from the
alternatives given:
Select the true statement
A. glycolysis produces equal numbers of ATP molecules regardless of the presence or absence of oxygen
B. more ATP molecules are produced per molecule of glucose when glycolysis occurs in aerobic conditions
C. more ATP molecules are produced per molecule of glucose wvhen glycolysis occurs in anaerobic conditions
D. none of the above are true
11
254Which molecule listed below is a
product of fermentation of glucose by
yeast?
A. ( C_{6} H_{10} O_{5} )
в. ( C_{2} H_{5} O H )
c. ( C_{6} H_{12} O_{6} )
D. ( C H_{3} O H )
11
255If one triose phosphate completely oxidized inside the prokaryotic cell, then the net gain of ATP of energy is equal to
A . 5 ATP
B. 4 АТР
c. 20 АтР
D. 19 ATP
11
256RQ (Respiratory Quotient) is defined as
A. Volume of ( mathrm{CO}_{2} ) evolved ( = )
volume of ( mathrm{O}_{2} ) consumed
begin{tabular}{llll}
B. Volume of & O ( _{2} ) consumed \
cline { 2 – 3 } Volume of & ( mathrm{CO}_{2} ) & evolved
end{tabular}
begin{tabular}{llll}
C. Volume & of & C O ( _{2} ) evolved \
cline { 2 – 3 } Volume & of & ( mathrm{O}_{2} ) & consumed
end{tabular}
D. ( frac{text { Volume of } O_{2}}{text { Volume of } C O_{2}} ) consumed
11
257Incomplete breakdown of glucose in
muscles results in the formation of
A. Alcohol and water
B. Alcohol and lactic acid
c. ( C O_{2} ) and water
D. Lactic acid
11
258In anaerobic respiration, acetaldehyde is reduced to form alcohol by utilising
( N A D H_{2} ) obtained from
A. Glycolysis
B. Terminal oxidation
c. Krebs cycle
D. Acetylation
11
259In which of the following processes is acetyl CoA not involved?
A. Fatty acid breakdown
B. Embden-Meyerhof pathway
c. Fatty acid synthesis
D. Transamination
11
260Define glycolysis and Krebs cycle11
261Which of the following statements is
not correct about oxidative
decarboxylation?
A. It takes place in mitochondrial matrix
B. Two molecules of NADH are produced by one molecule of pyruvate
C. Pyruvate dehydrogenase is used as catalyst in this reaction
D. Two molecules of NADH are produced by two molecules of pyruvate
11
262Choose the correct answers from the
alternatives given :

Which of the following does not form during glycolysis?
A. NADH
в. Атр
c. Pyruvate
D. ( F A D H_{2} )

11
263Define R.Q. What is its significance?11
264Which of the following is not formed during anaerobic respiration?
A. Pyruvate
B. Ethyl alcohol
( c cdot c O_{2} )
D. Acetyl CoA
11
265Phosphorylation of glucose during glycolysis is catalysed by
A. Phosphoglucomutase
B. Phosphoglucoisomerase
c. Hexokinase
D. Phosphorylase
11
266Glycolysis occurs
A. In cytoplasm
B. In aerobic respiration
C. In anaerobic respiration
D. All of the above
11
267During lactic acid fermentation,
( A cdot O_{2} ) is used, ( C O_{2} ) is not liberated.
B. ( O_{2} ) is not used, ( C O_{2} ) is liberated.
( mathrm{C} cdot mathrm{O}_{2} ) is used, ( mathrm{CO}_{2} ) is liberated.
D. Neither ( O_{2} ) is used, nor ( C O_{2} ) is liberated.
11
268All the reactions in glycolysis are
reversible except
A. 3 -Phosphoglycerate to 1,3 -Biphosphoglycerate.
B. Glucose 6-phosphate to fructose – 6-phosphate.
C. 1,3 -Biphosphoglycerate to glyceraldehyde 3 -P.
D. Fructose – 6 -phosphate to fructose- 1,6 -diphosphate.
11
269During passage of electron over ETC
A. Electron undergoes resonance
B. Electron undergoes fluorescence
c. Electron undergoes active transport
D. pH of matrix increases
11
270Name the scientist
A) Who discovered the process of
fermentation?
B) Who discovered Germ theory of
disease?
C) Who discovered penicillin?
D) Who developed Vaccine?
11
271Enzyme helping in oxidative decarboxylation of pyruvic acid is
A. Pyruvate kinase
B. Pyruvic dehydrogenase
c. Malate dehydrogenase
D. succinic dehydrogenase
11
272The full form of NAD is
A. Nicotine adenosine diphosphate
B. Nicotinamide adenosine dinucleotide
C. Nicotinamide adenine dinucleotide
D. Nicotinamide adenine diphosphate
11
273During complete metabolism of glucose, the number of ATP formed is
( A cdot 2 )
B. 12
c. 36
( D cdot 44 )
11
274In succulents, respiratory quotient is less than one due to
A. Incomplete oxidation
B. Incomplete reduction
c. complete reduction
D. Complete oxidation
11
275Formation of phosphoenol pyruvate from 2-pliosphoglycerate is
A. Dehydration
B. Dehydrogenation
c. oxidation
D. Hydration
11
276Which of the following statements is
incorrect regarding fermentation?
A. Propionibacterium is used to ferment the cheese.
B. The puffed-up appearance of dough is due to the production of ( C O_{2} ) gas.
C. Fermentation in muscle produces ethanol
D. Toddy is made by fermenting sap from palms.
11
277Which of these steps in Krebs cycle
indicates substrate level
phosphorylation?
A. Conversion of succinic acid to ( alpha ) -ketoglutaric acid
B. Conversion of succinic acid to malic acid
c. conversion of succinyl CoA to succinic acid
D. Conversion of malic acid to oxaloacetic acid
E. conversion of citric acid to ( alpha ) -ketoglutaric acid
11
278Number of oxygen molecules utilized in
glycolysis is
( mathbf{A} cdot mathbf{0} )
B. 2
( c cdot 4 )
( D )
11
279During glycolysis, molecules of
NADH are formed.
11
280Glycolysis is conversion of
A. Glucose to glycogen
B. Glycogen to glucose
c. Glucose to pyruvic acid
D. Glucose to citric acid
11
281Number of NADH produced during breakdown of one molecule of glucose to 1: 3 diphosphoglycerate stage is
( A cdot 6 )
B. 4
( c cdot 3 )
D.
11
282Describe the steps involved in
glycolysis (flow chart or explanation).
11
283Assertion
Krebs cycle is amphibolic.
Reason
Krebs cycle produces maximum amount of ATP.
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
284When 2 molecules of pyruvic acid forms 2 molecules of lactic acid by anaerobic respiration then
A. One ATP is lost.
B. Three ATP is lost
C. Six ATP is lost.
D. None of the above
11
285In Krebs cycle the FAD participates as electron acceptor during the conversion of
A. Succinyl CoA to succinic acid
B . ( alpha ) – ketoglutarate to succinyl COA
c. Fumaric acid to malic acid
D. Succinic acid to fumaric acid
11
286The main purpose of cellular respiration
is to
A. Convert potential energy to kinetic energy
B. Convert kinetic energy to potential energy
C . Convert energy in to cell chemical
D. Convert energy stored in the chemical bonds of glucose to an energy that the cell can use
11
287Choose the correct answers from the
alternatives given During electron transport each molecule of NADH produces how many molecules of ATP?
( A )
B. 2
( c cdot 3 )
D. 4
11
288Before entering the TCA cycle, pyruvic acid converted into acetyl CoA. This process is known as
A. Oxidative carboxylation
B. Oxidative dehydration
c. oxidative decarboxylation
D. Reductive phosphorylation
11
289The production of pH gradient during oxidative metabolism of glucose takes place during
A. Glycolysis
B. Anaerobic respiration
c. Krebs cycle
D. Electron transport chain
E. None of the above
11
290Electrons from succinate in Kreb’s cycle are picked by
A. FMN of first complex of ETC
B. FMN of second complex ETC
c. FAD of I complex of ETC
D. FAD of II complex ETC
11
291Choose the correct answers from the
alternatives given :
Which one of the following processes makes direct use of oxygen?
A. Glycolysis
B. Krebs cycle
C. Alcoholic fermentation
D. Electron transport
11
292Which of the following metabolites enter the TCA cycle during glucose oxidation?
A. Oxaloacetic acid
B. Pyruvic acid
c. Acetyl CoA
D. Malic acid
11
293Which of the following is true for Krebs cycle?
A. Isocitrate ( rightarrow ) Fumrate ( rightarrow alpha ) ketoglutarate
B. ( alpha ) Ketoglutarate ( rightarrow ) Oxalosuccinate ( rightarrow ) Isocitrate
c. oxalosuccinate ( rightarrow ) Isocitrate ( rightarrow alpha ) ketoglutarate
D. Isocitrate ( rightarrow alpha ) ketoglutarate ( rightarrow ) Succinate
11
294Define RQ. Write a short note on RQ.11
29511
glycolysis has been given below. Select the option which correctly fills up the blanks for ( P, Q, R ) and ( S .left[‘ X^{prime} ) stands for right.
‘nil’].

Steps
[
text {Glucose } rightarrow text {Glucose }-6-
]
1. phosphate
Fructose ( -6- )
2. ( quad ) phosphate ( rightarrow ) Fructose ( – )
[
begin{array}{l}
1,6-text { bisphosphate } \
1,3-
end{array}
]
3
bisphosphoglycericacid ( rightarrow )
[
begin{array}{l}
text { orsprospnogiycericacia } rightarrow \
3-text { Phospho – glycericacid } \
2-
end{array}
]
4
Phosphoenolpyruvicacid ( rightarrow ) Pyruvicacid
A. P-1; Q-X; R-X; S-2
B. P-1; Q-X; R-2; S-X
c. ( P-2 ; Q-1 ; R-X ; S-1 )
D. P-X; Q-1; R-2; S-X

11
296Which is the key intermediate
compound linking glycolysis to Kreb’s cycle ?
11
297Enzymes required for phosphorylation are located in ( ldots ). chloroplast.
A. Peristromium
B. Plastidome
c. stroma
D. Quantosome
11
298First step in respiration is
A. Aerobic oxidation of pyruvic acid
B. Liberation of ( C O_{2} )
C . Glycolysis
D. Electron transport system
11
299Consider the following two equations ( A ) and B.
Equation A Glucose ( rightarrow ) Pyruvate ( rightarrow C O_{2}+H_{2} O+ )
Energy Equation B
Glucose ( rightarrow ) Pyruvate ( rightarrow C_{2} H_{5} O H+ )
( boldsymbol{C O}_{2}+ ) Energy
Which one of the following is correct with respect to both the equations ( A )
and B?
A. A is aerobic respiration consisting of glycolysis and Krebs cycle, B is anaerobic fermentation reaction
B. A is anaerobic respiration and B is aerobic fermentation reaction
c. A is aerobic respiration B is anaerobic lactic acid fermentation
D. In both A and B reactions, pyruvate undergoes complete oxidation.
11
300The commonest thing which can respire in the absence of oxygen is
A. Yeast.
B. Clostridium.
c. Muscles.
D. All of the above.
11
301Acetyl CoA is produced from pyruvate by
A. oxidative decarboxylation
B. oxidative photophosphorylation
c. oxidative hydrogenation
D. oxidative photorespiration.
11
302Which is the correct order for the
processes involved in aerobic cellular respiration?
A. Krebs cycle, glycolysis, electron transport chain
B. Glycolysis, Krebs cycle, electron transport chain
c. Glycolysis, fermentation, electron transport chain,
D. Fermentation, Krebs cycle, electron transport chain.
E. Glycolysis, electron transport chain, fermentation
11
303The formation of acetyl coenzyme-A from pyruvic acid is the result of
A. Reduction
B. Dehydration
c. Dephosphorylation
D. Oxidative decarboxylation
11
304The inhibitory effect of the presence of
( O_{2} ) on anaerobic respiration is termed
as
A. Warburg effect
B. Pasteur effect
c. Emerson’s effect
D. oxygen effect
11
305A deficiency of pulmonary surfactant would
A. Decrease surface tension
B. Decrease the work of breathing
c. Both of the above
D. None of the above
11
306Which of the following is not an intermediate of Krebs cycle?
A. Acetyl CoA
B. Citric acid
c. succinic acid
D. Lactic acid
11
307Muscle cells engaged in vigorous activity, build up a high concentration
of
A . Lactic acid.
B. Pyruvic acid.
c. Alcohol.
D. cholesterol.
11
308Pyruvic acid ( +C o A+N A D^{+} frac{M g^{2+}}{X} rightarrow )
( boldsymbol{Y}+boldsymbol{C O}_{2}+boldsymbol{N} boldsymbol{A} boldsymbol{D} boldsymbol{H}+boldsymbol{H}^{+} )
In the following reaction, identify ( X ) and Y respectively:
A. Water, Acetyl CoA
B. Acetyl CoA, Pyruvate dehydrogenase
c. Pyruvate dehydrogenase, Acetyl CoA
D. Pyruvate dehydrogenase, Oxalo-acetic acid
11
309Choose the correct labeling
Glyceraldehyde-3-P
( mathbf{1}, mathbf{3} )
A. a. Ethanol
b. ( C O_{2} )
c. Acetaldehyde
B. a. ( C O_{2} )
b. Acetaldehyde
c. Ethanol
( mathrm{c} cdot ) a. ( mathrm{CO}_{2} )
b. Ethanol
c. Acetaldehyde
D. a. Ethanol
b. Acetaldehyde
c. ( C O_{2} )
E. a. Acetaldehyde
b. ( C O_{2} )
c. Ethanol
11
310Which of the following correctly shows the difference in the products of glycolysis and Krebs cycle per glucose molecule?
A. Glycolysis – 4 ATP, 1 reduced NAD, Krebs Cycle – 4 reduced NAD, 1 reduced FAD, 1 ATP
B. Glycolysis – 4 ATP, 2 reduced NAD, Krebs Cycle – 8 reduced NAD, 2 reduced FAD, 2 ATP
c. Glycolysis – 2 ATP, 1 reduced NAD, Krebs Cycle – 3 reduced NAD, 1 reduced FAD, 1 ATP
D. Glycolysis – 2 ATP, 2 reduced NAD, Krebs Cycle – 6 reduced NAD, 2 reduced FAD, 2 ATP
11
311Choose the correct answers from the
alternatives given :
Which one of the following is the link between glycolysis and Krebs cycle?
A. Acetyl coenzyme A
B. Phosphoenolpyutvic acid
c. Citric acid
D. Acetyl acetic acid
11
312How many carbon dioxide is produced by reduction of pyruvate by Kreb’s cycle?
( A cdot 2 )
B. 3
( c cdot 4 )
D.
11
313The cycle in which pyruvic acid is
broken down in the presence of oxygen is known as
A. Glycolysis
B. Kreb’s cycle
c. Anaerobic respiration
D. None of the above
11
314How many ATP is utilized in the preparatory phase of glycolysis?
A. 7
B. 4
( c cdot 2 )
D.
11
315Which of the following is formed from phosphorylation?
A. Fructose 1,6-bisphosphate
B. Phosphoglyceric acid
c. PEP
D. Pyruvic acid
11
316Choose the correct answers from the
alternatives given :
Which of the following engage in lactate fermentation?
A. Lactobacillus cells
B. Muscle cells
c. Sulphate-reducing bacteria
D. Both (a) and (b)
11
317The energy releasing process in which
the substrate is oxidized without an
external electron acceptor is called as
A. Aerobic respiration
B. Glycolysis
c. Fermentation
D. Photorespiration
11
318How many ATP’s are produced by complete oxidation of PEP?11
319Which of the following is widely accepted to respire in absence of oxygen?
A . Yeast
B. Potato
c. chlorella
D. Grass
11
320Which of the following method is responsible for ATP production by green plant cells in the presence of sunlight?
A. By phosphorylation only
B. By oxidative phosphorylation only
c. By only substrate level phosphorylation
D. All of the above
11
321Alcoholic fermentation occurs in the
presence of
A. Zymase.
B. Amylase.
c. Invertase.
D. Maltase.
11
322In which of the following, respiration takes place in absence of oxygen?
A. Man
B. Potato
c. Yeast
D. Spirogyra
11
323In anaerobic respiration, the seeds
respire
A. In the presence of ( 0_{2} )
B. In the presence of ( mathrm{CO}_{2} )
( c . ) In the absence of ( 0_{2} )
D. In the absence of ( mathrm{CO}_{2} )
11
324Where are the enzymes of the electron
transport system found?
11
325Glycolysis
A. Occurs in mitochondria.
B. Has no connection with ETC.
C . Reduces 2 molecules of NAD ( ^{+} ) per glucose.
D. Produces no ATP.
11
326Choose the correct answers from the
alternatives given :
The pathway of aerobic respiration is completed in the
A. cytoplasm
B. mitochondrion
c. plasma membrane
D. nucleus
11
327The end product of glycolysis is
A. Pyruvic acid
B. Glucose
c. Ethyl alcohol
D. ( C O_{2} )
11
328A mixture containing equal quantity of germinating maize and groundnut seeds are taken. The RQ of this mixture
would be
A. one
B. Less than one
c. More than one
D. Infinity
11
329Conversion of pyruvic acid into ethyl alcohol is mediated by
A. Phosphatase
B. Dehydrogenase.
c. Decarboxylase and dehydrogenase.
D. catalase.
11
330Assertion
Glycolysis is the first step of respiration in which glucose completely breaks into ( C O_{2} ) and ( H_{2} O )
Reason
In this process, there is net gain of twenty four molecules of ATP.
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
331In Yeast, anaerobic respiration produces
A. ( C O_{2} ) and ethanol
B. ( C O_{2} ) and water
( mathrm{c} cdot O_{2} ) and lactic acid
D. ( O_{2} ) and pyruvic acid
11
332Pyruvic acid is a product of
A . Acety
B. CoA
c. starch
D. Glucose
11
333How many glucose molecules are required for the formation of 52 pyruvic acid molecules at the end of glycolysis?
A . 52
B. 46
( c cdot 32 )
D. 26
11
334In glycolysis, the rate limiting enzyme
is
A. Glucokinase
B. Phosphofructokinase
c. Phosphohexose isomerase
D. Aldolase
11
335Which is false regarding EMP pathways?
A. End product is ( C O_{2} ) and ( H_{2} O )
B. Substrate level phosphorylation
c. Production of ATP
D. Expenditure of ATP
11
336Oxidative decarboxylation of pyruvic acid results in the formation of
I. Acetyl CoA
Il. ( C O_{2} )
III. ATPIV. NADH ( +boldsymbol{H}^{+} )
A. I only
B. I and II only
c. I, Il and III only
D. I, II and IV only
E. III and IV only
11
337Which of the following is involved in the catalysis of link reaction during aerobic respiration?
A. Vitamin A
B. Vitamin ( B_{1} )
c. Vitamin ( B_{6} )
D. Vitamin K
11
338Choose the correct answers from the
alternatives given :
Which of these processes occurs in the cytosol?
A. Krebs cycle
B. Glycolysis
c. Electron transport system
D. Transition reaction
11
339Dinitrophenol (DNP) allows hydrogen ions to leak across a membrane which
can harm the ( H^{+} ) gradient. Select the
correct statement.
A. It would permit a greater growth rate, since the cell would no longer have to spend energy pumping ( H^{+} ) across the membrane
B. It would permit a greater growth rate, because the equalization of ( H^{+} ) on both sides of a membrane would help the cell cope with an acidic environment.
c. If the cell was a neuron, it would have no impact, because the charge difference on the surface of the neuron membrane is based on ( N a^{+} ) and ( K^{+}, ) not on
( H^{+} )
D. The cell would lose the bulk of its energy production because of DNP’s interference with chemiosmosis
E. It would slow the growth rate slightly, but the cell would compensate by maintaining the function of proton pumps
11
340The net gain of ATP molecules through glycolysis is
A. 6
B. 4
( c cdot 8 )
D. 36
11
341Which of the following is correct
sequence in Krebs cycle?
A. Isocitric acid ( rightarrow ) Oxalosuccinic acid ( rightarrow alpha ) -ketoglutaric acid
B. Oxalosuccinic acid ( rightarrow ) Isocitric acid ( rightarrow alpha ) -ketoglutaric acid
C ( . alpha ) -ketoglutaric acid ( rightarrow ) Isocitric acid ( rightarrow ) Oxalosuccinic acid
D. Isocitric acid ( rightarrow alpha ) -ketoglutatric acid ( rightarrow ) Oxalosuccinic acid
11
342The reaction of Krebs cycle take place
A. In cytoplasm
B. In endoplasmic reticulum
C. In matrix of mitochondria
D. On the surface of mitochondrion
11
343R.Q. of malic acid is
( A cdot 0.7 )
B. 1
( c cdot 1.33 )
D. 4
11
34440. What accumulates in the mus-
cles after continuous strenuous
physical exercise as a result of
temporary anaerobic respiration
that causes muscular fatigue ?
(1) ATP
(2) Lactic acid
(3) Ethyl alcohol
(4) Carbon dioxide
11
345The final electron acceptor of mitochondria is
A. Pyruvate.
B. NADP.
( c cdot 0_{2} )
D. OAA (oxalo acetic acid)
11
346Choose the correct statement(s).
A. Fermentation is the process of conversion of pyruvate into ethanol and ( C O_{2} ) under aerobic conditions.
B. Pyruvate breakdown into ( C O_{2} ), water and energy occurs in the mitochondria during anaerobic respiration.
C. Glycolysis is the breakdown of glucose into pyruvate by means of ten step reactions in the cytoplasm.
D. The common respiratory substrate is glycogen.
11
347End product of fermentation of sugars is
A. Water and carbon dioxide
B. Alcohol and carbon dioxide
c. Carbon dioxide
D. Alcohol
11
348During lactic acid fermentation
( A cdot O_{2} ) is used, ( C O_{2} ) is not liberated.
B. ( O_{2} ) is not used, ( C O_{2} ) is liberated.
( mathrm{C} cdot mathrm{O}_{2} ) is used, ( mathrm{CO}_{2} ) is liberated.
D. Neither ( O_{2} ) is used, nor ( C O_{2} ) is liberated.
11
349Which of the following is not an oxidation reaction?
A. 1,3 Bis PGAL to 1,3 Bis PGAA
B. 1,3 Bis PGA to 3 – PGA
c. Pyruvic acid to acetyl CoA
D. Malic acid to oxaloacetic acid
11
350In respiration, pyruvic acid is
A. Formed only when oxygen is available
B. One of the products of Krebs cycle
C. Broken down into two carbon fragments and ( mathrm{CO}_{2} )
D. A result of protein breakdown
11
351Fermentation is
A. Anaerobic respiration
B. Incomplete oxidation of carbohydrates
C . Complete oxidation of carbohydrates
D. None of the above
11
352The value of R.Q. of a succulent plant at night is
( A cdot1 )
c. zero.
D. Infinite.
11
353Glycolysis is the breakdown of glucose to pyruvic acid. How many molecules of pyruvic acid are formed from one
molecule of glucose?
( A cdot 1 )
B . 2
( c .3 )
( D .4 )
11
354Aerobic respiratory pathway is appropriately called as
A. Anabolic
B. Catbolic
c. Amphibolic
D. Parabolic
11
355What causes R. Q. to vary?
A. Respiratory substrates
B. Light and ( O_{2} )
C . Respiratory products
D. Temperature
11
356What is respiratory quotient (RQ) ? Why RQ in anaerobic respiration is infinite?11
357How many ATP molecules could maximally be generated from one molecule of glucose if the complete
oxidation of one mole of glucose to ( C O_{2} )
and ( H_{2} O ) yields 686 kcal and the useful chemical energy available in the high energy phosphate bonds of one mole of ATP is 12 kcal?
A. Fifty-seven
B. One
c. Two
D. Thirty
11
358Substrate phosphorylation is the formation of
A. ATP
в. АМР
c. ADP
D. Pyruvic acid
11
359The number of molecules of pyruvic
acid formed from one molecule of
glucose at the end of glycolysis is
( A )
B. 2
( c cdot 3 )
( D cdot 4 )
11
360The enzymes catalysing reactions 1,2 and 3 respectively in the above steps
are
Glucose
Triose phospate (3-phosphoglyceric acid)
2-phosphoglyceric acid 2-phosphoenol pyruvate
pyruvic acid
A. Phosphoglyceromutase, Enolase, Pyruvate kinase
B. Enolase, Phosphofructoknase, Pyruvate kinase
C. Phosphoglycerokinase, Enolase, Pyruvate kinase
D. G-3-P dehydrogenase, Enolase, Phosphoglyceromutase
11
361Compensation point is the value of the factor where there is
A. Neither photosynthesis nor respiration
B. Little photosynthesis
c. Photosynthesis is equal to the rate of respiration
D. Beginning of photosynthesis
11
362Which of the following is the product of phosphorylation?
A . PGA
B. Fructose 1,6-diphosphate
c. DPGA
D. Pyruvic acid
11
363Products of fermentation are
A. Alcohol and lipoprotein
B. Ether and nucleic acid
C. Protein and nucleic acid
D. Alcohol and lactic acid
11
364Oxygen is reduced to water in
A. Fermentation
B. Calvin cycle.
c. Electron transport
D. Krebs cycle.
11
365In glycolysis, the end product is
A. Protein is converted into glucose
B. Glucose is converted into glycogen
c. starch is converted into glucose
D. Glucose is converted into pyruvic acid
11
366The chemiosmotic theory of ATP synthesis in the chloroplasts and mitochondria is based on
A. Proton gradient
B. Accumulation of K ions
c. Accumulation of Na ions
D. Membrane potential
11
367Gaurav was participating in a marathon. Just when he was nearing the finishing line. He started running even
faster. However, when he was about to reach the finishing line, he suffered a severe muscle cramp in his leg. He could not run and affected the race. Subhash, his friend immediately reached out to him and massaged the affected area, relieving some pain.
(a) Which process in the human body provides most of the energy to humans for activities such as running of marathon?
(b) Which substance gets accumulated in the leg muscles of Gaurav., that cause muscle cramps?
(c) What values were shown by Subhash in this situation? (write any one value)
11
368In last step of glycolysis the
A. Protein is converted to glucose
B. Glucose is converted into glucose
c. starch is converted into glucose
D. Glucose is converted into pyruvic acid
11
369Which of the following minerals activates the enzymes involved in respiration?
A. Nitrogen and phosphorus
B. Magnesium and manganese
c. Potassium and calcium
D. Sulphur and iron
E. copper and boron
11
370For formation of ethanol, pyruvic acid is
first changed to acetaldehyde by
enzyme
A. Pyruvate dehydrogenase
B. Pyruvate decarboxylase
c. Alcohol oxidase
D. Alcohol dehydrogenase
11
371How many ATP molecules produced by anaerobic oxidation of one molecule of
glucose?
( A cdot 2 )
B. 4
( c cdot 38 )
D. 34
11
372The respiratory quotient during cellular respiration would depend on
A. The nature of enzymes involved
B. The nature of the substrate.
c. The amount of carbondioxide released.
D. The amount of oxygen utilized.
11
373toppr
Q Type your question
Glucose
Glyceraldehyde
Lactic
( +mathrm{CO}_{2} )
( mathbf{A} cdot mathbf{A}-N A D H+H^{+} rightarrow N A D^{+} ; mathrm{B}-N A D^{+} rightarrow N A D H+ )
( H^{+} ; mathrm{C}-N A D^{+} rightarrow N A D H+H^{+} )
B. A-NADH ( +H^{+} rightarrow N A D^{+} ; ) B-N ( A D H+H^{+} rightarrow )
( N A D^{+} ; mathrm{C}-N A D^{+} rightarrow N A D H+H^{+} )
C ( cdot mathrm{A}-N A D^{+} rightarrow N A D H+H^{+} ; mathrm{B}-N A D H+H^{+} rightarrow )
( N A D^{+} ; mathrm{C}-N A D H+H^{+} rightarrow N A D^{+} )
D. ( A-N A D^{+} rightarrow+H^{+} ; B-N A D H+H^{+} rightarrow N A D^{+} ; C- )
( N A D^{+} rightarrow N A D H+H^{+} )
11
374Select the correct option:
Identify ( A, B ) and ( C ) in the given reaction of lactic acid fermentation and select
the correct option. Pyruvic acid ( + ) Lactate deh
( boldsymbol{A}_{boldsymbol{F} boldsymbol{M} boldsymbol{N}, boldsymbol{Z} boldsymbol{n}^{2+}}^{text {and }} boldsymbol{B}+boldsymbol{C} )
A ( cdot ) A-NADH ; B- Lactic acid ( +C O_{2} ; ) C- ( N A D^{+} )
B. A-NADH; B-Lactic acid ; C- ( N A D^{+} )
c. ( A-N A D^{+} ; ) B- Lactic acid ( ; ) C- NADH
D. A-NAD’; B-Lactic acid + ( C O_{2} ; ) C-NADH
11
375Alternate name for Krebs cycle is
A . Glyoxylate cycle
B. Glycolate cycle.
c. Citric acid cycle
D. EMP pathway.
11
376Glycolysis pathway was invented by
A. Calvin
в. Kreb
c. J.C Bose
D. None of the above
11
377In anaerobic respiration of yeast
( A cdot O_{2} ) is given out
B. ( C O_{2} ) is given out
( mathrm{c} cdot mathrm{CO}_{2} ) is taken in
( D cdot O_{2} ) is taken in
11
378Oxidation of one molecule of glucose yields 38 mols of ATP in the proportion
of
A. 8 in cytosol and 30 in mitochondrion
B. 30 in cytosol and 8 in mitochondrion
( c .38 ) in cytosol
D. 38 in mitochondrion
11
379Assertion
The proton gradient is broken down due
to the movement of protons across the
membrane channel of the ( F_{0} ) of the
ATPase
Reason
It is the breakdown of proton gradient
that 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. Assertion is incorrect and Reason are correct
11
380Which of the following processes is responsible for the relatively low
concentrations of ( C O_{2} ) in bowls 2 and ( 3 ? )
A. Respiration
B. Fermentation
c. Photosynthesis
D. Photoperiodism
E. Transpiration
11
381Assertion
Anaerobic respiration sometimes occurs in our skeletal muscles during strenous exercise.
Reason
Pyruvic acid is reduced to lactic acid by lactate dehydrogenase in the absence of oxygen.
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
382Distinguish between glycolysis and
citric acid cycle.
11
383In glycolysis, enzyme enolase produces
A. Phosphoglyceric acid
B. Phosphoenol pyruvate
c. Phosphoglyceraldehyde
D. Pyruvate
11
384Fermentation is a type of anaerobic respiration that occurs in yeast and bacteria.What is the function of
fermentation?
I. Regenerate ( boldsymbol{N} boldsymbol{A} boldsymbol{D}^{+} ) from ( mathrm{NADH} )
II. Produce oxygen as a waste product
III. Produce ATP
A. I only
B. II only
c. ॥ only
D. I and II only
E. I and III only
11
385R.Q. is ratio of
( mathbf{A} cdot mathrm{CO}_{2} ) produced to substrate consumed
B. ( mathrm{CO}_{2} ) produced to ( mathrm{O}_{2} ) consumed
c. Oxygen consumed to water produced
D. Oxygen consumed to ( mathrm{CO}_{2} ) produced.
11
386Which of the following process occurs in glycolysis?
A. Oxidation
B. Reduction
c. Hydrogenation
D. Fixation
11
387Acetyl CoA reacts with OAA to form
A. Formaldehyde
B. Acetate
c. Isocitrate
D. citrate
11
388Assertion
( F_{1} ) particles are present in the inner
mitochondrial membrane.
Reason
An electrochemial proton gradient formed on the inner mitochondrial
membrane, forms ATP.
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
389Complete oxidation of ( 1 mathrm{gm} ) of glucose molecule gives rise to
A. 68,60,000 cal
B. 6,86,000 cal
c. 68,600 cal
D. 6,800 cal
11
390Organism which can respire in absence
of ( boldsymbol{O}_{2} ) is
A. Chlorella
B. Solanum
c. Saccharum
D. saccharomyces
11
391In Krebs cycle, the Hydrogen atoms removed at succinate level are
accepted by
A. FAD
B. ADP
c. Атр
D. NAD
11
392How many ATP molecules are obtained
from fermentation of 1 molecule of
glucose?
( A cdot 2 )
B. 4
( c cdot 3 )
D. 5
11
393Value Based Questions:
The role of ATP can be compared with that of a battery Explain this statement.
11
394Choose the correct answers from the
alternatives given :
Which process involves chemiosmotic phosphorylation?
A. Krebs cycle
B. Glycolysis
c. Electron transport system
D. Fermentation
11
395Identify the electron donor for the electron transport chain in photosynthesis.
A. Oxygen
B. NADPH ( _{2} )
c. NADP
D. water
11
396Short / Long Answer Types:
Explain the major steps of glycolysis. Where does this process occur in a cell?
11
397Assertion
Glycolysis is the first step of respiration, where glucose completely
breaks into ( mathrm{CO}_{2} ) and ( mathrm{H}_{2} mathrm{O} )
Reason
In this process, there is net gain of twenty four molecules of ATP.
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
398The last stage of cellular respiration which yields ATP by the oxidation of organic molecules, derived from glucose is
A. Chemiosmosis
B. Citric acid cycle.
c. Electron transport chain
D. Glycolysis.
E. Oxidation phosphorylation.
11
399Krebs cycle starts with the formation of six carbon compound by reaction between
A. Malic acid and acetyl CoA
B. Succinic acid and pyruvic acid
c. Fumaric acid and pyruvic acid
D. Acetyl CoA and oxaloacetic acid
11
400Short / Long Answer Types:
What is the significance of Krebs cycle in the economy of the cell?
11
401Electron acceptors in ETS are arrange according to
A. Decreasing positive potential
B. Increasing positive potential
c. Increasing negative potential
D. None of the above
11
402Which of the following steps during glycolysis is associated with utilization of ATP?
A. Glucose ( rightarrow ) Glucose- 6 -phosphate
B. Fructose-6-phosphate ( rightarrow ) Fructose- 1,6 -bisphosphate
c. PEP ( rightarrow ) Pyruvic acid
D. Both (a) and (b)
11
403Krebs cycle takes place in the
A. Vesicles of E.R.
B. Mitochondrial matrix.
c. Dictyosomes
D. Lysosomes
11
404The number of ATP molecules utilised
for the breakdown of one molecule of
glucose during glycolysis is
( A cdot 62 )
B. 2
( c cdot 8 )
( D cdot 4 )
11
405For undergoing glycolysis, glucose requires priming with the help of how
many ATP?
( A )
B. 2
( c cdot 3 )
D. 4
11
406In alcohol fermentation
A. Triose phosphate is the electron donor while acetaldehyde is the electron acceptor
B. Triose phosphate is the electron donor while pyruvic acid is the electron acceptor
C. There is no electron donor
D. Oxygen is the electron acceptor
11
407Which of these is the final electron
acceptor in the electron transport
chain?
A. ( F A D H_{2} ).
B. ( N A D H )
c. cytochrome c.
D. water
E. Oxygen
11
408Respiratory intermediate which
undergoes fermentation is generally
A. Glyceraldehyde 3-phosphate
B. 2-phosphoglyceric acid
c. PEP
D. Pyruvic acid
11
409The mechanism of phosphorylation is
depicted in the diagram below. Study it
carefully and mark the correct option.
A. The diagram depicts photosynthetic phosphorylation taking place in the chloroplast. The incident light should be shown in the diagram
B. The diagram depicts oxidative phosphorylation taking place in mitochondria. However, the flow of electrons should be shown in the reverse direction
c. Diagram depicts the basic process of both oxidative as well as photosynthetic phosphorylation. However, the proton concentration should be high inside and low outside
D. The diagram correctly depicts the oxidative phosphorylation occuring in all heterotrophic isms
11
410RQ is more than one indicating
A. Aerobic respiration
B. Anaerobic respiration.
c. Both A and B
D. None of the above.
11
411Fermentation products of yeast are
( mathbf{A} cdot mathrm{H}_{2} mathrm{O}+mathrm{C} mathrm{O}_{2} )
B. Methyl alcohol ( +mathrm{CO}_{2} )
C. Methyl alcohol + Water
D. Ethyl alcohol ( +mathrm{CO}_{2} )
11
412The diagram summarises the pathway of glucose break down.
Hexose
Triose phosphate
( 6 mathrm{C} ) compound
[
mathrm{H}_{2} mathrm{O}+mathrm{CO}_{2}
]
11
413Breathing:
A. ventilates lungs
B. draws air into airways
C. expels air from airways
D. all of these
11
414What could be the reason for maida
flour to increase in size?
A. Fermentation
B. Preservation
c. Fumigation
D. Both A and B
11
415Very Short Answer Types:
Name the connecting link between
glycolysis and the Krebs cycle.
11
416For two molecules of glucose, glycolysis uses and produces ATP molecules
A. 4 and 8
B. 2 and 4
( c cdot 2 ) and 8
D. 2 and 2
11
417What is active glucose?
A. FAD glucose
B. NAD glucose
c. Glucose-6-Phosphate
D. Glycerophosphate
11
418Anaerobic respiration of
animals/humans produces
A. Glucose and ( mathrm{O}_{2} )
B. ( mathrm{C}_{2} mathrm{H}_{5} mathrm{OH} ) and ( mathrm{CO}_{2} )
C. Lactic acid and water
D. ( mathrm{CO}_{2} ) and ( mathrm{H}_{2} mathrm{O} )
11
419Succinate is oxidised to fumarate in
Krebs cycle by
A. Removal of hydrogen
B. Loss of electrons
c. Addition of oxygen
D. Removal of oxygen
11
420R.Q. would depend upon
A. Nature of enzymes
B. Nature of substrate
C. Amount of ( mathrm{CO}_{2} ) released
D. Amount of ( mathrm{O}_{2} ) utilised
11
421During carbohydrate metabolism, NADH is produced in which of the following locations?
I. Cytosol
Il. Mitochondrial matrix
III. Nucleus.
A. I only
B. II only
c. I and II only
D. I, II and III
11
422Which is true of glycolysis
A. In aerobic organisms, it is the only process in respiration
B. In this process glucose undergoes complete oxidation to form pyruvic acid
C. Enzyme hexokinase catalyses phosphorylation of glucose to glucose 6 -phosphate
D. ATP is utilised in conversion of PEP to pyruvic acid
E. ( mathrm{NADH}+H^{+} ) is formed when
1, 3-biphosphoglyceric acid is converted to 3-phosphoglyceric acid
11
423Which of the following conversions involve ATP synthesis during glycolysis?
A. Glucose ( rightarrow ) Glucose- 6 -phosphate
B. Fructose-6-phosphaterightarrowFructose-1,6-biphosphate
c. 1,3 -bisphosphoglyceric acid (BPGA) ( rightarrow 3- ) phosphoglyceric acid (PGA)
D. All of these
11
424Conversion of glucose to glucose- 6 phosphate, the first irreversible reaction of glycolysis, is catalysed by?
A. Aldolase
B. Hexokinase
c. Enolase
D. Phosphofructokinase
11
425Pasteur effect is concerned with the
shifting of environmental conditions from
A. Light to dark
B. Aerobic to anaerobic
c. Anaerobic to aerobic
D. Light to anaerobic
11
426Glycolysis occurs in the of the
cells.
11
427The enzyme which converts glucose to glucose- 6 -phosphate is
A. Phosphorylase
B. Glucose-6-phosphate
c. Hexokinase
D. Glucose synthetase
11
428Mechanism of aerobic respiration / tricarboxylic acid pathway was discovered by
A. Calvin
B. Krebs
c. Pasteur.
D. Hatch and Slack
11
429Fermentation is represented by the
equation
( mathbf{A} cdot C_{6} H_{12} O_{6}+6 O_{2} rightarrow 6 C O_{2}+6 H_{2} O+673 mathrm{k} ) cal
B ( cdot C_{6} H_{12} O_{6} rightarrow 2 C_{2} H_{5} O H+2 C O_{2}+18 k ) cal
( mathbf{c} cdot 6 C O_{2}+12 H_{2} O rightarrow C_{6} H_{12} O_{6}+6 H_{2} O+6 O_{2} )
( mathbf{D} cdot 6 C O_{2}+6 H_{2} O rightarrow C_{6} H_{12} O_{6}+6 O_{2} )
11
430Product formed by the activity of malic dehydrogenase in the TCA cycle is
A. Fumaric acid
B. Malic acid
c. Oxaloacetic acid.
D. succinic acid
11
431Incomplete breakdown of sugars in anaerobic respiration forms
A. Glucose and ( C O_{2} ).
B. Alcohol and ( C O_{2} ).
c. water and ( C O_{2} )
D. Fructose and water
11
432Name the connecting link between glycolysis and TCA cycle and explain it.11
433Give example to prove that microbes release gases during metabolism.11
434Short / Long Answer Types:
Are carbohydrates such as glucose the only source of energy for the cell?
11
435An amphibolic pathway is
A. TCA cycle
B. Calvin cycle
c. Terminal oxidation
D. Electron transport chain
11
436Which group of the following scientists discovered the EMP pathway or glycolysis?
A. Embden, Meyerhof and Parnas
B. Embden, Hoffman and Peterson
c. Embden, Morrison and Pitcher
D. Avery, McLeod and McCarthy
11
437Pyruvic acid ( frac{text { Pyruvate }}{text {dehydrogenase}} ) Acetyl CoA( + )
( boldsymbol{C O}_{2}+boldsymbol{N a D H}_{2} )
In this given reaction which of the following coenzyme is not used?
A. ( M g^{+}+ )
B. ( N A D )
c. ( C o-A )
D. ( T P P )
11
438Which type of fermentation is
accompanied by ( mathrm{CO}_{2} ) evolution?
A. Alcoholic fermentation
B. Lactic acid fermentation
c. Both A and B
D. None of the above
11
439Which of the following show anaerobic respiration?
A. Earthworm
B. Rabbitt
c. Echinoderms
D. tapeworms
11
440Glycolysis is a:
This question has multiple correct options
A. Redox process
B. Aerobic process
c. oxidative process
D. Reductive process
11
441Which of the following is incorrect for
glycolysis?
A. The end products of this process are ( C O_{2} ) and ( H_{2} O )
B. IT produces ATP
c. It uses ATP
D. None of these.
11
442Oxalosuccinic acid, a transient
intermediary compound of Krebs cycle
is
A. 4-carbon compound
B. 5-carbon compound
c. 6-carbon compound
D. 3-carbon compound
11
443Short / Long Answer Types:
How many atoms of oxygen are used
when a molecule of pyruvic acid is oxidised in Krebs cycle ? Give the. mechanism of oxygen utilisation and ATP formation.
11
444Fermentation is represented by which of
the following equation?
( mathbf{A} cdot $ $ mathrm{C}_{-}{6} mathrm{H}_{-}{12} mathrm{O}_{-}{6} backslash, ) ।rightarrow ( backslash, 6 mathrm{CO}_{-}{2} backslash,+_{-} backslash )
( 6 mathrm{H}_{-}{2} 01,+backslash, 673 mathrm{K} backslash, mathrm{cal} $ $ )
B. ( C_{6} H_{12} O_{6} rightarrow 2 C_{2} H_{5} O H+2 C O_{2} )
( mathbf{c} cdot 6 C O_{2}+12 H_{2} O rightarrow C_{6} H_{12} O_{6}+6 H_{2} O+6 O_{2} )
( mathrm{D} cdot 6 mathrm{CO}_{2}+6 mathrm{H}_{2} mathrm{O} frac{text {light}}{text {chlorophyll}} C_{6} mathrm{H}_{12} mathrm{O}_{6}+6 mathrm{O}_{2} )
11
445In the process of respiration, the largest amount of energy is produced during
A. Anaerobic respiration.
B. Krebs cycle and oxidative phosphorylation
c. Glycolysis.
D. None of the above
11
446Write any two difference between aerobic and anaerobic muscles.11
447Can you tell which metabolic pathway is taking place resulting in the formation
of ( mathrm{CO}_{2} ) ? Where do you think the bacteria for these fermentations came from?
11
448medium that contains excess glucose.
The graph below shows glucose
utilisation under different growth
conditions. ( (A),(B), ) and ( (C) ) in the graph
indicates.
A. A- Anaerobic respiration
B- Introduction of ( O_{2} ) to culture medium
C- Aerobic respiration
B. A- Aerobic respiration
B-Introduction of ( C O_{2} ) to culture medium
C- Anaerobic respiration
C. A- Aerobic respiration
B- Supply of organic triphosphate
C- Aerobic respiration
D. A- Aerobic respiration
B- – Introduction of CO to culture medium
C- Anaerobic respiration
11
449The puffed-up appearance of dough is due to fermentation by yeast. Identify the gas liberated during the process
A. Methane
B. Carbon dioxide
c. Hydrogen sulphide
D. Ammonia
11
450Number of oxygen molecules required during glycolysis of one glucose molecule is
A . 38
B. 36
( c cdot 2 )
D. zero
11
451Fructose 1: 6 biphosphate splits into two triose phosphates by enzyme
A. Aldolase
B. Amylase
c. zymase
D. Lipase
11
452Glycolysis takes place in the
A . Cytoplasm
B. Chloroplast
c. Ribosome
D. Mitochondria
11
453The process Glycolysis occurs in
A . Cytoplasm
B. Mitochondria
c. chloroplast
D. Golgi Complex
11
454Anaerobic process that takes place after glycolysis is called as
A . TCA
B. Calvin cycle
c. Krebs cycle
D. Fermentation
11
455Last ( e^{-} ) acceptor during ETS is
( A cdot O_{2} )
B. cyt ( a )
( mathbf{c} cdot operatorname{cyt} a_{2} )
D. cyt ( a_{3} )
11
456What are the assumptions made during the calculation of net gain of ATP?11
457The form in which carbon leaves the
citric acid cycle is
A. Acetalehyde
B. Carbon dioxide
c. Ethanol
D. None of these
11

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