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Nature & Animals

Which outcome inhibits energy production in plants subjected to high oxygen concentrations?

A)Photorespiration consumes ATP and NADPH
B)Increased electron transport chain efficiency
C)Enhanced carbon fixation by rubisco
D)Stomata fully close, maximizing photosynthesis

💡 Explanation

Photorespiration occurs as a consequence of rubisco binding O₂ rather than CO₂, therefore consuming ATP and NADPH. This inhibits productive carbon fixation because the plant generates fewer sugars in these conditions, rather than increased photosynthesis.

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