MDCAT Biology MCQ #522

As the Krebs cycle begins, a two-carbon acetyl group combines with a four-carbon acceptor molecule. Name this specific acceptor molecule.

MDCAT Biology MCQ #522

  1. Question 1

    Q1. As the Krebs cycle begins, a two-carbon acetyl group combines with a four-carbon acceptor molecule. Name this specific acceptor molecule.

    • A) Oxaloacetate
    • B) Citrate
    • C) Succinate
    • D) Pyruvate

    Answer: Oxaloacetate

    Explanation: Acetyl-CoA (2C) joins Oxaloacetate (4C) to form Citrate (6C). Pyruvate is the reactant before the link reaction, not the cycle.