Part 1: Key Ideas

1. What is the main purpose of cellular respiration?

To produce oxygen

To release energy from glucose

To make sunlight

To store carbon dioxide

2. Where does most aerobic cellular respiration take place?

Nucleus

Ribosome

Mitochondrion

Cell wall

3. Complete the word equation:

glucose + ____________ → carbon dioxide + water + ____________

4. Which features are found in a mitochondrion? Tick all that apply.

An outer membrane

A folded inner membrane

Chlorophyll

A matrix

Part 2: Explain and Apply

5. Write the balanced chemical equation for aerobic cellular respiration.

6. Explain why mitochondria are often called the “powerhouses” of cells.

7. Explain how the folds of the inner mitochondrial membrane help cellular respiration.

8. Muscle cells may respire anaerobically during vigorous exercise. What is produced, and why can this cause discomfort?

9. Draw and label a mitochondrion. Include the outer membrane, inner membrane, cristae and matrix.

10. In one or two sentences, compare aerobic and anaerobic respiration.