When Do Plants Respire

Question

When do plants respire?
A)in the dark only.
B)in the light only.
C)both in light and dark.
D)never-they get their ATP from photophosphorylation.
E)only when excessive light energy induces photorespiration.

Accepted Answer

Plants respire both in light and dark. During the day, they can generate ATP via photosynthesis, but they still need to respire to produce energy for cellular functions that use ATP, including growth and maintenance. At night, without photosynthesis, respiration is the only source of ATP.