Question

During photosynthesis, the following reaction takes place:

carbon dioxide + water + light energy → sugar + oxygen


During cellular respiration, the following reaction takes place:

sugar + oxygen → carbon dioxide + water + chemical energy


Given this information, how are photosynthesis and cellular respiration related?
A.
The products of photosynthesis are the reactants of cellular respiration.
B.
The same type of energy is found in both photosynthesis and cellular respiration.
C.
Photosynthesis and cellular respiration both start with the same materials.
D.
Photosynthesis and cellular respiration both produce the same materials.

Answer 1

A.

Photosynthesis makes sugar and oxygen, and those are exactly the reactants used in cellular respiration (sugar + O2), which in turn produce CO2 and H2O that photosynthesis uses.