Question

The creation of proton gradient across the inner membrane is a result of

• A. Decrease in proton number in stroma
• B. Accumulation of protons in the intermembrane space
• C. Decrease in the pH in the intermembrane space
• D. All of the above

Answer 1

The correct option is D All of the above

The creation of proton gradient across the inner membrane of mitochondria is a result of decrease in proton number in stroma, accumulation of protons in the intermembrane space and decrease in the pH. This leads to the creation of a proton gradient. ATP synthase then uses the energy stored in this gradient to make ATP.