MDCAT Biology MCQ #330

In the respiratory electron transport chain, oxygen molecules act as the:

MDCAT Biology MCQ #330

  1. Question 1

    Q1. In the respiratory electron transport chain, oxygen molecules act as the:

    • A) Initial electron donors
    • B) Intermediate carriers
    • C) Proton pumps
    • D) Final electron acceptors

    Answer: Final electron acceptors

    Explanation: Oxygen accepts electrons to form water. Cytochromes are tempting because they are electron carriers that precede oxygen in the chain.