Question

which process occurs during the light - dependent reactions in photosynthesis?
water molecules are split.
carbon fixation occurs.
pga is reduced.
rubp is regenerated.

Explanation:

During the light - dependent reactions of photosynthesis, water molecules are split (photolysis) to release oxygen, protons (\(H^{+}\)), and electrons. Carbon fixation, reduction of PGA (3 - phosphoglyceric acid), and regeneration of RuBP (ribulose - 1,5 - bisphosphate) occur in the light - independent reactions (Calvin cycle).

Answer:

Water molecules are split.