When Can Photorespiration Occur in Plants

Question

When can photorespiration occur in plants?
A) when stomata are closed
B) when oxygen levels inside the leaf are low
C) when the plant is undergoing transpiration
D) during the Calvin cycle

Accepted Answer

Photorespiration can occur in plants when the stomata are closed because this limits the availability of carbon dioxide, which is needed by the plant for photosynthesis. Without enough carbon dioxide, the plant may begin to use oxygen instead, leading to photorespiration.