Which of the following best explains why the rate of photosynthesis decreases sharply when the ambient temperature exceeds a plant's optimal thermal range?

A) Enzymes catalyzing the light-independent reactions undergo denaturation and lose catalytic activity.

B) Light-harvesting chlorophyll pigments break down directly into free amino acids.

C) Photolysis of water accelerates uncontrollably, depleting electron donors in photosystem II.

D) Excessive internal carbon dioxide levels accumulate and chemically block ATP synthase.

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Biology · Cellular Energetics · Biology · Photosynthesis

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Cellular Energetics · Biology

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