Which of the following statements describes a process that occurs during photosynthesis but not during cellular respiration? ATP is produced that stores energy.
O
Chemical energy is converted to light energy.
Reactions occur in the mitochondria of the cell.
Light energy is converted to chemical energy.

D (see below for explanation)

Explanation:

Using the process of elimination, we can go down the answer choices:

A) ATP is produced that stores energy.

In photosynthesis, light energy, water, and carbon dioxide is taken in and converted to oxygen and glucose. Cellular respiration, however, uses glucose and oxygen and converts it to water, carbon dioxide, and ATP.

As you can see, there is no mention of ATP in photosynthesis. ATP is not created in photosynthesis—photosynthesis' main purpose is to make food for the organism.

So A is not the answer.

B) Chemical energy is converted to light energy.

In photosynthesis, the light energy taken in is converted to chemical energy so it can be used. Cellular respiration requires only oxygen and glucose, so light energy doesn't relate to cellular respiration directly.

However, if you read the answer carefully, it says that chemical energy is converted to light energy. The main purpose is to use the light energy, which cannot be used in its light form, so it has be converted into chemical energy.

So B is not the answer.

C) Reactions occur in the mitochondria of the cell.

Photosynthesis occurs in the chloroplasts of an organisms. Heterotrophs do not have chloroplasts, so they cannot make their own food. However, mitochondria are in all eukaryotic cells, as cellular respiration occurs in all eukaryotic cells as well.

Cellular respiration happens in the mitochondria of a cell. Photosynthesis does not.

So C is not the answer.

D) Light energy is converted to chemical energy.

If you go back to my explanation for B, you can see that photosynthesis uses light energy, but to do so, it has to convert it to light energy first. It cannot use light energy itself.

So D is the right answer.