Question

fill in the blank question
protons are pumped across the thylakoid membrane of the chloroplast during the stage of the thylakoid (or light - dependent) reactions.

Explanation:

In the light - dependent reactions of photosynthesis in the thylakoid of the chloroplast, protons are pumped across the thylakoid membrane during the electron transport chain stage. The electron transport chain uses the energy from excited electrons to move protons from the stroma into the thylakoid lumen, creating a proton - motive force.

Answer:

electron transport chain