MDCAT Biology MCQ #256

Before entering the Citric Acid Cycle, pyruvate loses a carbon atom as CO2 and is attached to Coenzyme A. What is this step called?

MDCAT Biology MCQ #256

  1. Question 1

    Q1. Before entering the Citric Acid Cycle, pyruvate loses a carbon atom as CO2 and is attached to Coenzyme A. What is this step called?

    • A) Glycolysis
    • B) Krebs cycle
    • C) Chemiosmosis
    • D) Oxidation of pyruvate

    Answer: Oxidation of pyruvate

    Explanation: The transition step involves decarboxylation and oxidation of pyruvate. Glycolysis ends with pyruvate; the transition step produces Acetyl-CoA for the Krebs cycle.