MDCAT Biology MCQ #372

At the end of the mitochondrial electron transport chain, oxygen acts as the final electron acceptor and combines with protons to form:

MDCAT Biology MCQ #372

  1. Question 1

    Q1. At the end of the mitochondrial electron transport chain, oxygen acts as the final electron acceptor and combines with protons to form:

    • A) Glucose
    • B) ATP
    • C) Water
    • D) Carbon dioxide

    Answer: Water

    Explanation: Oxygen accepts electrons and protons to form water. CO2 (Option D) is a byproduct of the Krebs cycle, not ETC.