The electron transport chain forms a concentration gradient for H+, which diffuses through ATP synthase complexes, producing ____.

A) ATP
B) FAD
C) G3P
D) NADH
E) pyruvate

ATP Synthase Complexes

Complex enzyme structures that synthesize adenosine triphosphate (ATP), the energy currency of the cell, during the process of cellular respiration or photosynthesis.

Concentration Gradient

The gradual difference in the concentration of solutes in a solution between two regions, often leading to diffusion.

Electron Transport Chain

A series of protein complexes and other molecules that transfer electrons from electron donors to electron acceptors via redox reactions and generate ATP in the process.