Why is photorespiration more of a problem for a plant when their stomata are closed?

A. Oxygen, from water in photosystem I, cannot leave the leaf, and competes with carbon dioxide for rubisco's active site.
B. Oxygen, from photosystem I, cannot leave the leaf and causes hypertension to occur in the leaves.
C. Carbon dioxide levels increase from the light reactions, and compete with oxygen for rubisco's active site.
D. Oxygen cannot enter the leaf, blocking normal respiration, so the plants switch to photorespiration.
E. Water is lost when the stomata are open, and is not available to accept electrons from photosystem I.


A. Oxygen, from water in photosystem I, cannot leave the leaf, and competes with carbon dioxide for rubisco's active site.

Biology & Microbiology

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