Which outcome occurs when photorespiration rate exceeds carboxylation rate due to Rubisco during hot conditions?

💡 Explanation

When photorespiration exceeds carboxylation in hot conditions, Rubisco binds more oxygen than carbon dioxide because the active site's specificity decreases with temperature, leading to a net loss of fixed carbon and reduced ATP yield. Therefore reduced photosynthetic efficiency results, rather than regeneration, fixation or elevated starch synthesis which depends directly carbon fixation.

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