Question

Where does the energy come from to pump protons into the thylakoid space

(A) The sugar

(B) Excited electrons

(C) ATP

(D) Enzymes

Answer 1

C) ATP

Step-by-step explanation:

Energy from light is used by the chloroplast electron transport chain to pump protons across the thylakoid membrane into the lumen of the thylakoid. This creates a proton gradient that is used as a source of energy by ATP synthase.