300+ TOP MCQs on Krebs Cycle and Answers

NEET Biology is the vey important paper in the medical entrance exam. Here, you will discover the NEET Biology MCQs and Answers for all Concepts as per the latest syllabus. Practice more on a regular basis with these NEET Biology objective questions on air pollution . NEET Biology Krebs Cycle Multiple Choice Questions

MCQs on Krebs Cycle :

1. Product of Krebs cycle essential for oxidative phosphorylation is _______
(a) NADPH and ATP
(b) Acetyl CoA
(c) CO2 and oxaloacetate
(d) NADH and FADH2

Answer

Answer: (d)

2. A single molecule of glucose generates _________ molecules of acetyl CoA, which enters the Krebs cycle.
(a) 4
(b) 3
(c) 2
(d) 1

Answer

Answer: (d)

3. ___________ accepts hydrogen from malate
(a) FAD
(b) NAD
(c) NADP
(d) FMN

Answer

Answer: (b)

4. Which of the intermediate of the Kreb’s cycle is utilised in the formation of amino acids?
(a) Citric acid
(b) Malic acid
(c) Isocitric acid
(d) 𝛼-ketoglutaric acid

Answer

Answer: (d)

5. Krebs cycle occurs in aerobic respiration due to
(a) Electron transport chain requires aerobic conditions to operate
(b) Oxygen is a reactant
(c) Oxygen has a catalytic function
(d) All of the above

Answer

Answer: (a)

6. Acetyl CoA is formed from pyruvate by__________ reaction
(a) Dehydration
(b) Reduction
(c) Oxidative decarboxylation
(d) Dephosphorylation

Answer

Answer: (c)

7. Which of the following is not formed during the Krebs cycle?
(a) Lactate
(b) Isocitrate
(c) Succinate
(d) Both (a) and (b)

Answer

Answer: (a)

8. The entry of pyruvate into the TCA cycle is inhibited by the presence of a high cellular concentration of
(a) Pyruvate
(b) NADH
(c) Coenzyme A
(d) AMP

Answer

Answer: (b)

9. ATP synthesis is powered by
(a) Coenzyme motive force
(b) cAMP
(c) proton gradient
(d) GTP hydrolysis

Answer

Answer: (c)

10. FAD is reduced in which of the reaction of the Kreb’s cycle?
(a) Isocitrate to oxaloacetate
(b) Succinyl CoA to Succinate
(c) Fumarate to malate
(d) Succinate to fumarate

Answer

Answer: (d)

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