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Respiration in Plants · Question 8

RE-NEET (UG) 2024MCQMedium📈 Topic in 25% papers+4−1
1

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

Answer

(1) A, C, D, E only

Solution

A. Correct: cellular respiration is the breaking of C–C bonds of complex organic molecules by oxidation, releasing energy.

B. Incorrect: glycolysis takes place in the cytoplasm; only the Krebs cycle and ETS take place in mitochondria.

C. Correct: under anaerobic conditions (e.g. germinating seeds in waterlogged soil) pyruvate undergoes fermentation.

D. Correct: the fate of pyruvate depends on the cellular needs and the type of organism (lactic acid, ethanol or aerobic oxidation).

E. Correct: at the end of ETS, O2 accepts electrons and protons and is reduced to water.

A, C, D, E are correct.

Answer: (1)

RE-NEET (UG) 2024

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2

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
3

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
NEET (UG) 2023
4

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
5

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%
NEET (UG) 2022
6

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)
7

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

  1. Four
  2. One
  3. Two
  4. Three
NEET (UG) 2022 (Phase 2)
8

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)
NEET (UG) 2022 (Phase 2)
9

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
10

The number of substrate level phosphorylations in one turn of citric acid cycle is

  1. Zero
  2. One
  3. Three
  4. Two
NEET (UG) 2020
11

Conversion of glucose to glucose-6-phosphate, the first irreversible reaction of glycolysis, is catalyzed by

  1. Enolase
  2. Phosphofructokinase
  3. Aldolase
  4. Hexokinase
NEET (UG) 2019

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