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Respiration in Plants · Question 6

NEET (UG) 2024MCQMedium📈 Topic in 38% papers+4−1
1

Identify the step in tricarboxylic acid cycle, which does not involve oxidation of substrate.

  1. Malic acid Oxaloacetic acid
  2. Succinic acid Malic acid
  3. Succinyl-CoA Succinic acid
  4. Isocitrate -ketoglutaric acid

Answer

(3) Succinyl-CoA Succinic acid

Solution

Malic acid oxaloacetic acid: dehydrogenation, NAD+ is reduced to NADH + H+ (oxidation).

Succinic acid malic acid (via fumaric acid): FAD is reduced to FADH2 (oxidation).

Isocitrate -ketoglutaric acid: oxidative decarboxylation, NADH is formed (oxidation).

Succinyl-CoA succinic acid: substrate-level phosphorylation forming GTP (ATP); no hydrogen is removed, so the substrate is not oxidised.

Answer: (3)

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2

Match List-I with List-II:

  1. A-IV, B-I, C-III, D-II
  2. A-I, B-IV, C-II, D-III
  3. A-III, B-I, C-IV, D-II
  4. A-I, B-II, C-IV, D-III
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3

Which of the following are correct about cellular respiration? Choose the correct answer from the options given below :

  1. A, C, D, E only
  2. A, B, E only
  3. A, B, C, E only
  4. B, C, D, E only
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4

Given below are two statements : One is labelled as Assertion A and the other is labelled as Reason R: In the light of the above statements, choose the correct answer from the options given below :

  1. Both A and R are true but R is NOT the correct explanation of A.
  2. A is true but R is false.
  3. A is false but R is true.
  4. Both A and R are true and R is the correct explanation of A.
NEET (UG) 2023
5

Match List I with List II: Choose the correct answer from the options given below :

  1. A-II, B-IV, C-I, D-III
  2. A-III, B-I, C-II, D-IV
  3. A-II, B-IV, C-III, D-I
  4. A-III, B-IV, C-II, D-I
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6

What is the net gain of ATP when each molecule of glucose is converted to two molecules of pyruvic acid?

  1. Four
  2. Six
  3. Two
  4. Eight
NEET (UG) 2022
7

What amount of energy is released from glucose during lactic acid fermentation?

  1. Approximately 15%
  2. More than 18%
  3. About 10%
  4. Less than 7%
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8

The 5-C compound formed during TCA cycle is

  1. Fumaric acid
  2. α-ketoglutaric acid
  3. Oxalosuccinic acid
  4. Succinic acid
NEET (UG) 2022 (Phase 2)
9

The number of time(s) decarboxylation of isocitrate occurs during single TCA cycle is

  1. Four
  2. One
  3. Two
  4. Three
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10

Match List-I with List-II Choose the correct answer from the options given below.

  1. (a)-(ii), (b)-(iv), (c)-(i), (d)-(iii)
  2. (a)-(ii), (b)-(i), (c)-(iv), (d)-(iii)
  3. (a)-(iv), (b)-(i), (c)-(ii), (d)-(iii)
  4. (a)-(iii), (b)-(iv), (c)-(ii), (d)-(i)
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11

Which of the following statements is incorrect?

  1. Oxidation-reduction reactions produce proton gradient in respiration
  2. During aerobic respiration, role of oxygen is limited to the terminal stage.
  3. In ETC (Electron Transport Chain), one molecule of NADH + H+ gives rise to 2 ATP molecules, and one FADH2 gives rise to 3 ATP molecules
  4. ATP is synthesized through complex V
NEET (UG) 2021

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