Question

where does cellular respiration occur?
in the chloroplast
in the mitochondria
in the nucleus
on the cell membrane

Explanation:

Cellular respiration is the process by which cells convert glucose and oxygen into energy (ATP). Mitochondria are known as the "powerhouses" of the cell because they are the main site where this process occurs. Chloroplasts are involved in photosynthesis (in plant cells), the nucleus contains genetic material, and the cell membrane is mainly for protection and regulating what enters/exits the cell.

Answer:

In the mitochondria