Which of the following statements is incorrect?
Answer: (D) 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. Answer: (D) In ETC, one molecule of NADH + H+ gives rise to 2 ATP molecules, and one FADH2 gives rise to 3 ATP molecules.
- A.ATP is synthesized through complex V
- B.Oxidation-reduction reactions produce proton gradient in respiration.
- C.During aerobic respiration, role of oxygen is limited to the terminal stage
- D.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✓
Correct Answer
(D) 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
Solution & Explanation
Answer: (D) In ETC, one molecule of NADH + H+ gives rise to 2 ATP molecules, and one FADH2 gives rise to 3 ATP molecules. Solution: This statement is incorrect because the values are reversed: oxidation of one NADH yields 3 ATP and one FADH2 yields 2 ATP. The other three options are correct: ATP synthase (complex V) makes ATP, the proton gradient is generated by oxidation-reduction reactions of the ETS, and oxygen acts only at the terminal stage as the final electron/hydrogen acceptor. NCERT: Ch 12, p.160, line ~31: "one molecule of NADH gives rise to 3 molecules of ATP, while that of one molecule of FADH2 produces 2 molecules of ATP".