How does ATP synthase obtain the energy to produce ATP?
A) Hydrogen ions flow down a concentration gradient from the thylakoid space to the stroma through ATP synthase, releasing energy that can be used to produce ATP from ADP + Pi.
B) Water splits, releasing electrons that flow from the stroma to the thylakoid space and attach to the active site of ATP synthase.
C) Electrons from the reaction site center of photosystem II are funneled to ATP synthase, which uses the energy to produce ATP from ADP + Pi.
D) Hydrogen ions in the thylakoid space combine with electrons from the stroma at ATP synthase, releasing energy that can be used to produce ATP from ADP + Pi.
E) A hydrogen ion from NADPH is used by ATP synthase to power the production of ATP from ADP + Pi, and an electron is released, splitting water.

Question

Quizplus · Accepted Answer

Energy is derived from electrons moving down energy levels through the electron carriers of the electron transport chain, and this is used by some of these proteins to move protons against their concentration gradient to the inside of the thylakoid. The protons exit at the ATP synthase, and as they move down energy levels, the energy released is used to make ATP.

How Does ATP Synthase Obtain the Energy to Produce ATP