MDCAT Biology MCQ #207

During oxidative phosphorylation, electron carriers transfer energy to the ETC. How does the ATP yield of NADH compare to FADH2?

MDCAT Biology MCQ #207

  1. Question 1

    Q1. During oxidative phosphorylation, electron carriers transfer energy to the ETC. How does the ATP yield of NADH compare to FADH2?

    • A) NADH yields 2 ATP; FADH2 yields 3 ATP
    • B) Both molecules yield 3 ATP
    • C) NADH yields 3 ATP; FADH2 yields 2 ATP
    • D) NADH yields 4 ATP; FADH2 yields 2 ATP

    Answer: NADH yields 3 ATP; FADH2 yields 2 ATP

    Explanation: NADH produces 3 ATP in the ETC, whereas FADH2 enters later at Coenzyme Q, yielding only 2 ATP.