Question

most of cellular respiration takes place inside the _____, as long as there is _____ present. options: chloroplast; oxygen, chloroplast; carbon dioxide, mitochondria; oxygen, mitochondria; carbon dioxide

Explanation:

To solve this, we recall cellular respiration concepts:

1. Cellular respiration (aerobic, which is the main type) occurs in mitochondria. Chloroplasts are for photosynthesis, so options with chloroplast (orange, blue) are wrong.
2. Aerobic respiration needs oxygen. Carbon dioxide is a product, not a reactant for respiration. So the correct pair is mitochondria and oxygen.

Answer:

C. mitochondria; oxygen (assuming the green option is labeled C, but based on the content, the correct choice is the one with "mitochondria; oxygen")