Why does the efficiency of sugar production decrease when stomata are closed in C3 plants?
A) Accumulated oxygen outcompetes carbon dioxide for rubisco's active site.
B) Depleted carbon dioxide outcompetes oxygen for rubisco's binding site.
C) Accumulated oxygen inhibits rubisco's function.
D) Depleted carbon dioxide inhibits rubisco's function.
E) Depleted carbon dioxide activates rubisco's function.

Question

Quizplus · Accepted Answer

When stomata are closed, carbon dioxide levels inside the leaf decrease, and oxygen levels increase. Rubisco, the enzyme responsible for fixing carbon dioxide, can also bind to oxygen, leading to photorespiration, which reduces the efficiency of sugar production.

Why Does the Efficiency of Sugar Production Decrease When Stomata