MDCAT Biology MCQ #519

In the mitochondrial electron transport chain, electrons are finally passed to an inorganic molecule to form water. What is this final acceptor?

MDCAT Biology MCQ #519

  1. Question 1

    Q1. In the mitochondrial electron transport chain, electrons are finally passed to an inorganic molecule to form water. What is this final acceptor?

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

    Answer: Molecular oxygen

    Explanation: Oxygen is the final electron acceptor in the ETC, forming water. Cytochrome a3 is the last carrier but not the final acceptor.