MDCAT Biology MCQ #613

In the electron transport chain, which complex is responsible for pumping the most protons across the mitochondrial inner membrane?

MDCAT Biology MCQ #613

  1. Question 1

    Q1. In the electron transport chain, which complex is responsible for pumping the most protons across the mitochondrial inner membrane?

    • A) Complex I
    • B) Complex II
    • C) Complex III
    • D) Complex IV

    Answer: Complex I

    Explanation: Complex I pumps the most protons, while Complex II does not pump protons at all.