MDCAT Biology MCQ #293

During the Krebs cycle, the oxidation of a four-carbon succinate molecule occurs. Which coenzyme is specifically reduced during this specific step?

MDCAT Biology MCQ #293

  1. Question 1

    Q1. During the Krebs cycle, the oxidation of a four-carbon succinate molecule occurs. Which coenzyme is specifically reduced during this specific step?

    • A) NAD+
    • B) FAD
    • C) NADP+
    • D) GDP

    Answer: FAD

    Explanation: Succinate dehydrogenase reduces FAD to FADH2; NAD is tempting but it is reduced at other specific Krebs cycle steps.