Select all the substances that must be present in mitochondria for the process of aerobic respiration to take place.

a
carbon dioxide
b
enzymes
c
organic molecules
d
oxygen
e
chlorophyll

b

enzymes
c
organic molecules
d
oxygen

The substances that must be present in mitochondria for the process of aerobic respiration to take place are:

- Enzymes
- Organic molecules
- Oxygen

So, the correct options are b, c, and d.

The substances that must be present in mitochondria for the process of aerobic respiration to take place are:

- Oxygen (Option: d): Oxygen is essential for aerobic respiration as it serves as the final electron acceptor in the process.

- Enzymes (Option: b): Enzymes are crucial for facilitating the various reactions involved in aerobic respiration. They act as catalysts to speed up the chemical reactions.

- Organic molecules (Option: c): Organic molecules, such as glucose, are the main fuel source for aerobic respiration. These molecules are broken down during the process to produce energy.

Therefore, the correct options are d (oxygen), b (enzymes), and c (organic molecules).