MDCAT Biology MCQ #308

In the mitochondrial electron transport chain, what is the final electron acceptor that prevents the system from becoming backed up?

MDCAT Biology MCQ #308

  1. Question 1

    Q1. In the mitochondrial electron transport chain, what is the final electron acceptor that prevents the system from becoming backed up?

    • A) Cytochrome a3
    • B) Molecular oxygen
    • C) Water
    • D) NAD+

    Answer: Molecular oxygen

    Explanation: Oxygen is the final electron acceptor in the ETC, forming water. Cytochrome a3 is the last protein carrier before oxygen.