MDCAT Biology MCQ #390

As protons flow back into the mitochondrial matrix through ATP synthase, energy is harnessed. Where is the highest concentration of protons maintained during respiration?

MDCAT Biology MCQ #390

  1. Question 1

    Q1. As protons flow back into the mitochondrial matrix through ATP synthase, energy is harnessed. Where is the highest concentration of protons maintained during respiration?

    • A) Inner membrane
    • B) Intermembrane space
    • C) Mitochondrial matrix
    • D) Outer membrane

    Answer: Intermembrane space

    Explanation: Protons are pumped into the intermembrane space, creating a gradient; the matrix has a lower proton concentration during active transport.