MDCAT Biology MCQ #573

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

MDCAT Biology MCQ #573

  1. Question 1

    Q1. In the electron transport chain, which complex is responsible for pumping 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 protons, Complex II incorrect because it doesn't pump protons