Thursday, March 15, 2012


1 Inner membrane of mitochondrion is less permeable to

2 Percentage of aerobic respiratory enzymes present in mitochondrial matrix is

3 Amount of energy released upon hydrolysis of one ATP is

Ans:7.6 K.Cal
4 Choose the correct statement

Ans:ETS can be operated before the initiation of Kreb’s cycle
5 Match the following with respect to Glycolysis

Ans:A - V, B - III,C - IV, D - I
6 Study the following table with respect to Glycolysis and choose the correct combination

Ans:I and III
7 [A]: Anaerobic respiration is less efficient than aerobic respiration
[R]: ATP production ratio between aerobic and anaerobic respiration is 20:1

Ans:A is true but R is false
8 The following intermediate of Glycolysis can not directly take part in further oxidation reactions respiration

9 In Glcolysis, there is no involvement of
I. Hydrolases
II. Ligases
III. Lyases
IV. Transferases

Ans:I and II
10 Arrange the involvement of the following of a cell in correct sequence during aerobic respiration.
I. Inner membrane of Mitochondron
II. Cytosol
III. Oxysomes
IV. Mitochondrial matrix

Ans:II, IV, I, III
11 The sequence of events that occur during conversion of Pyruvic acid to Acetyl Co.A is

Ans:Decarboxylation, Oxidation, Condensation
12 One of the following is an intrinsic protein

Ans:Succinate dehydrogenase
13 Arrange the involvement of following enzymes in correct sequence during Kreb’s cycle
I. Thiokinase
II. Decarboxylase
III. Fumarase
IV. Aconitase

Ans:IV, II, I, III
14 Choose the correct match with respect to oxidation of Pyruvate in mitochondrial matrix

Ans:A - V, B - IV, C - II, D - I
15 Study the following table with respect to aerobic respiration in Mitochondrial matrix and choose the correct combinations

Ans:I, II, III, IV
16 [A]: Kreb’s cycle is Amphibolic pathway
[R]: Citric acid cycle helps in oxidation of Proteins and also provides intermediates for amino acid formation

Ans:Both A and R are true and R is the correct explanation of A
17 Substrates of Kreb’s cycle subjected to Condensation
I. Oxalo acetic acid
II. Acetyl Co.A
III. α-keto glutaric acid
IV. Co.A

18 If there is formation of 30 ATP due to substrate level phosphorylation in Aerobic respiration, the number of Glucose molecules oxidized in respiraton must be

19 During Glycolysis, the C-C bond of the substrate is broken by the activity of

20 Identify the correct sequence of enzymes involved in Acetyl Co.A formation

Ans:Pyruvate decarboxylase, Dihydrolipoyl transacetylase, Dihydrolipoyl dehydrogenase
21 FAD behaves as cofactor during the formation of following in aerobic respiration
I. Acetyl Co.A
II. Succinyl Co.A
III. Fumaric acid
IV. Citric acid

Ans:All except IV
22 The following enzyme can either remove or add water to the substrate

23 If only one molecule of O2 is provided during aerobic breakdown of one molecule of Glucose, aerobic respiration ends with the formation of following product

Ans:Pyruvic acid
24 The last formed 6-C acid in Kreb’s cycle is

Ans:Oxalosuccinic acid
25 10threaction of Kreb’s cycle is

26 Lipoic acid is involved as a part of enzyme during the formation of the following of Kreb’s cycle

Ans:α – keto glutaric acid
27 During aerobic breakdown of a molecule of Glucose, arrange the following electron carriers of ETS with respect to their involvement for the first time.
I. Complex III
II. Complex II
III. Complex I

Ans:IV, I, III, II
28 During aerobic oxidation of a molecule of Glucose, the total number of protons transported through Complex I is

29 Fe-S centers are absent in

Ans:Complex IV
30 During ETC, protons are not carried by
I. Complex II
III. Complex III
IV. Cytochrome C

Ans:I and IV
31 The total number of protons removed from mitochondrial matrix during aerobic breakdown of a molecule of Glucose is

32 The following particle of inner membrane of mitochondrion allows the movement of protons down the concentration gradient.

33 Match the following with respect to Inner membrane of Mitochondrion during ETS

Ans:A - V, B - III, C - II, D -I
34 Study the following table and choose the correct combination with respect to ETS

Ans:II and IV
35 [A]: Reduced UQ always gives e- to complex III
[R]: It picks e- only from Complex I and Complex II

Ans:A is true but R is false
36 The following electron carrier of ETS is not exposed towards intermembrane space of Mitochondrion

Ans:Complex II
37 During ETS, O2 picks protons from

Ans:Complex IV
38 Rotatory movement is shown by

Ans: F1
39 If a molecule of Acetyl Co.A is aerobically oxidized, the no.of ATP formed in F1 would be

40 [A]: There is no net production of NADH + H+ in anaerobic respiration
[R]: Anaerobic respiration lacks oxidation reactions

Ans:A is true but R is false
41 The term fermentation was given by

42 Amount of energy lost as heat during anaerobic oxidation of a molecule of Glucose is

Ans:40.8 K.Cal
43 Ratio between decarboxylation reactions of Aerobic and anaerobic respirations is

44 Clostridium botulinum is

Ans:Obligate anaerobe
45 Arrange the following reactions of anaerobic respiration in a sequence.
I. Oxidation
II. Reduction
III. Substrate level phosphorylation
IV. Decarboxylation

Ans:I, III, IV, II
46 If the chemical formula of a respiratory substrate is C75H160O50, the respiratory substrate must be a

47 Arrange the following respiratory substrate with gradual increase in its R.Q.
I. Tartaric acid
II. Oleic acid
III. Fructose
IV. Malic acid

Ans:II, III, IV, I
48 Ganongs respirometer is used to estimate

Ans:Respiratory Quotient
49 The highest number of H2O molecules are released during the oxidation of

50 The R. Q. for these respiratory intermediates is same
I. Acetyl Co.A
IV. Malic acid

Ans:I and III
51 Arrange the following respiratory substrate with gradual increase in the consumption of O2 during each of its molecule oxidation.
I. Oxalic acid
II. Oleic acid
III. Tartaric acid
IV. Glucose

Ans:I, III, IV, II
52 Match the following

Ans:A - II, B - I, C - IV, D - V
53 Study the following table and choose the correct combination

Ans:A-IV, B-III, C-I, D-II
54 [A]: R.Q. of Triolein is less than the R.Q of Glucose
[R]: Triolein has less number of Oxygen atoms per molecule than Glucose

Ans:A is true but R is false
55 Study the following table and choose the correct combination

Ans:II, IV
56 [A]: R.Q. of fats is lesser than that of organic acids.
[R]: The number of O2 atoms in a molecule of Tripalmitin is equal to the number of oxygen atoms in Tartaric acid.

Ans:Both A and R are true but R is not the correct explanation of A

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