Which outcome occurs when photorespiration consumes oxygen in chloroplasts during intense sunlight?

💡 Explanation

When intense sunlight causes high oxygen levels, photorespiration uses RuBisCO's oxygenase activity because carbon dioxide is limited, triggering oxygen binding; leading to phosphoglycolate production and lost carbon fixation. Therefore RuBisCO oxygenase activity is increased, rather than enhanced NADPH, decreased ATP synthase efficiency, or stimulated Calvin cycle which rely on carbon dioxide fixation.

• Which modification increases crop yield when daytime temperatures induce photorespiration?
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