MDCAT Biology MCQ #267

Before entering the Krebs cycle, pyruvate undergoes oxidative decarboxylation to form which specific two-carbon intermediate?

MDCAT Biology MCQ #267

  1. Question 1

    Q1. Before entering the Krebs cycle, pyruvate undergoes oxidative decarboxylation to form which specific two-carbon intermediate?

    • A) Citrate
    • B) Oxaloacetate
    • C) Lactate
    • D) Acetyl-CoA

    Answer: Acetyl-CoA

    Explanation: Acetyl-CoA is the 2-carbon entry molecule; Oxaloacetate is the 4-carbon acceptor already present in the cycle.