When hydrogen ions are pumped from the mitochondrial matrix across the inner membrane and into the intermembrane space,the result is A)the formation of ATP. B)the reduction of NAD⁺. C)a decrease in the pH of the mitochondrial matrix. D)the creation of a proton-motive force.

Question

Quizplus · Accepted Answer

The pumping of hydrogen ions creates a gradient of protons (H+) across the inner membrane, which generates a proton-motive force that can be used to synthesize ATP. The other options are incorrect: (A) ATP synthesis is a consequence of the proton-motive force; (B) NADH/NADPH reduction is not directly affected by proton pumping; (C) the pH of the intermembrane space decreases as hydrogen ions accumulate there, not in the mitochondrial matrix.

When Hydrogen Ions Are Pumped from the Mitochondrial Matrix Across