Which mechanism causes decreased photosynthetic efficiency when rubisco binds oxygen instead of carbon dioxide?

💡 Explanation

When rubisco binds oxygen, photorespiration occurs because it initiates a pathway consuming ATP and NADPH, reducing the efficiency of carbon fixation. Therefore, the consumption of ATP and NADPH results, rather than chlorophyll degradation, stomatal closure, or thylakoid damage, that are triggered by other environmental stresses.

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