Noncyclic photophosphorylation produces
A) ATP only.
B) oxygen.
C) NADPH only.
D) ATP and NADPH.
E) water and ATP.

Question

Quizplus · Accepted Answer

Noncyclic photophosphorylation produces both ATP and NADPH. During noncyclic photophosphorylation, light energy is used to energize electrons in photosystem II, which are then passed through a series of carriers, ultimately providing energy to pump protons across the thylakoid membrane. The resulting proton gradient drives ATP synthesis through chemiosmosis. At the same time, photosystem I receives electrons from photosystem II, replenishing its own electron supply. These electrons are then further energized by light energy and used to reduce NADP+ to NADPH. So, noncyclic photophosphorylation produces both ATP and NADPH, which are used during the light-independent reactions of photosynthesis to make glucose.

Noncyclic Photophosphorylation Produces