In the thylakoid membrane, two photosystems are involved in the light reactions of photosynthesis. Which of the following best explains the mechanism by which photosystem I (PS I) and photosystem II (PS II) operate during linear electron flow?
Electrons flow from PS I to PS II, gaining potential energy to be later used in the Calvin cycle.
Electrons flow from PS II to PS I, releasing energy that is used to generate ATP.
PS I absorbs light energy, which is transferred to PS II and used to split water molecules.
PS I transports free electrons to PS II, beginning the electron transport chain.
