Why does photorespiration decrease the efficiency of photosynthesis?
A)It increases the amount of carbon dioxide consumed.
B)It reduces the amount of water consumed.
C)It reduces the amount of sugar produced.
D)It produces excess NADPH but less ATP.
E)It inhibits electron transfers from photosystem II.

Question

Quizplus · Accepted Answer

Photorespiration competes with photosynthesis for the same substrate, resulting in a reduction of the amount of sugar produced. Photorespiration also consumes ATP and generates carbon dioxide, which reduces the efficiency of photosynthesis.

Why Does Photorespiration Decrease the Efficiency of Photosynthesis