The proton-motive force is composed of a ____ and a ____, and in photophosphorylation the ____ is greater. A) pH gradient; ATP/H⁺ ratio; ATP/ H⁺ ratio B) ATP/ H⁺ ratio; ion equilibrium; ion equilibrium C) membrane potential; pH gradient; membrane potential D) membrane potential; pH gradient; pH gradient E) ATP/ H⁺ ratio; membrane potential; membrane potential

Question

Quizplus · Accepted Answer

The proton-motive force is composed of a membrane potential and a pH gradient. In photophosphorylation, the pH gradient is greater due to the pumping of protons into the thylakoid lumen during the light-dependent reactions of photosynthesis. Therefore, the correct answer is D, which includes membrane potential and pH gradient as components of the proton-motive force and indicates that the pH gradient is greater in photophosphorylation.

The Proton-Motive Force Is Composed of a ____ and a ____

The Proton-Motive Force Is Composed of a and a