The Ultimate Source of Energy for Reactions in a Plant

Question

The ultimate source of energy for reactions in a plant is
A)glucose.
B)catabolism.
C)plants.
D)the sun.
E)glycogen.

Accepted Answer

The ultimate source of energy for reactions in a plant is the sun, which provides light energy for photosynthesis. Glucose is a product of photosynthesis, not the ultimate source of energy. Catabolism and glycogen are processes and storage forms of energy for organisms, but not the ultimate source of energy for reactions. "Plants" is too broad of an answer and does not correctly identify the specific source of energy for reactions in plants.