Why is photosynthesis a coupled reaction?
A) The exergonic reaction occurs in the plant, and the endergonic reaction occurs in the soil.
B) Photosynthesis requires two reactants: carbon dioxide and water.
C) Sunlight energy enters a plant and is ultimately lost as heat.
D) The exergonic reaction occurs in the plant, and the endergonic reaction occurs in the sunlight.
E) An exergonic reaction occurs in the sunlight, and an endergonic reaction occurs in the plant.

Question

Quizplus · Accepted Answer

Photosynthesis is a coupled reaction because it involves an exergonic reaction (light energy from the sun) that provides the energy needed for the endergonic reaction (conversion of carbon dioxide and water into glucose and oxygen) within the plant.

Why Is Photosynthesis a Coupled Reaction