Question

Which best describes the relationship of the reaction below to the photosynthesis reaction?

Sugar + oxygen → carbon dioxide + water + ATP.

a. This reaction is the reverse of the photosynthesis reaction.
b. Photosynthesis is unrelated to this reaction.
c. This reaction is exactly the same as the photosynthesis reaction.
d. This is one small part of the larger photosynthesis reaction.

Answer 1

The relationship of the reaction, where sugar and oxygen produce carbon dioxide, water, and ATP, to photosynthesis is that it is the reverse process; cellular respiration releases the energy stored by photosynthesis.

Step-by-step explanation:

The relationship of the reaction Sugar + oxygen → carbon dioxide + water + ATP to the photosynthesis reaction is best described as the reverse of the photosynthesis reaction. In photosynthesis, glucose and oxygen are produced from carbon dioxide and water with the input of sunlight energy:
6CO2 + 6H2O + sunlight → C6H12O6 + 6O2. Conversely, during cellular respiration, glucose (sugar) and oxygen are consumed to produce carbon dioxide, water and ATP (energy):
C6H12O6 + 6O2 → 6CO2 + 6H2O + ATP. These two processes are complementary, with photosynthesis storing energy in glucose, while cellular respiration releases this stored energy for cellular work.