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

Question

Quizplus · Accepted Answer

The pumping of hydrogen ions from the mitochondrial matrix across the inner membrane and into the intermembrane space creates a proton-motive force, which is a form of potential energy that can be harnessed to produce ATP through chemiosmosis.

When Hydrogen Ions Are Pumped from the Mitochondrial Matrix Across