MDCAT Biology MCQ #532

Before entering the Krebs cycle, pyruvate must be oxidized. What is the name of this transitional step that produces NADH and CO2?

MDCAT Biology MCQ #532

  1. Question 1

    Q1. Before entering the Krebs cycle, pyruvate must be oxidized. What is the name of this transitional step that produces NADH and CO2?

    • A) Glycolysis
    • B) Calvin Cycle
    • C) Lactic acid fermentation
    • D) Oxidative decarboxylation

    Answer: Oxidative decarboxylation

    Explanation: Pyruvate is converted to Acetyl-CoA in the link reaction, releasing CO2. Glycolysis does not release CO2; it only breaks down glucose.