MDCAT Biology MCQ #554

When comparing the transition reaction (pyruvate oxidation) to the Krebs cycle, which product is generated in a higher quantity by the Krebs cycle?

MDCAT Biology MCQ #554

  1. Question 1

    Q1. When comparing the transition reaction (pyruvate oxidation) to the Krebs cycle, which product is generated in a higher quantity by the Krebs cycle?

    • A) The production of FADH2 molecules
    • B) The formation of ATP via substrate-level phosphorylation
    • C) The amount of carbon dioxide released
    • D) The reduction of NAD+ to NADH

    Answer: The amount of carbon dioxide released

    Explanation: The Krebs cycle produces 2 CO2 per turn (4 per glucose), while the transition reaction produces 1 CO2 per pyruvate (2 per glucose).