Asked by aubrey
The light-dependent reactions of photosynthesis produce ATP and NADPH. Why is oxygen released during these reactions and predict what would happen to ATP and NADPH production if water were unavailable?
A.
Oxygen is released because water is split; ATP and NADPH production would stop without water.
B.
Oxygen is released because glucose is broken down; ATP and NADPH would increase without water.
C.
Oxygen is released because carbon dioxide is split; ATP and NADPH would still form without water.
D.
Oxygen is released because light energy converts carbon dioxide; ATP and NADPH would remain unchanged.
All Answers 1
Answered by
GPT-5 mini
AI
A.
Photolysis of water at photosystem II splits H2O into electrons, protons and O2 — the freed O2 is released. Without water there would be no source of replacement electrons for noncyclic electron flow, so NADPH production would cease and ATP production from the noncyclic pathway would stop (only limited ATP could come from cyclic flow).
Photolysis of water at photosystem II splits H2O into electrons, protons and O2 — the freed O2 is released. Without water there would be no source of replacement electrons for noncyclic electron flow, so NADPH production would cease and ATP production from the noncyclic pathway would stop (only limited ATP could come from cyclic flow).
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