# A muscle cell requires large amounts of energy during exercise. Explain why muscle cells contain many mitochondria and describe how oxygen and glucose are used inside these organelles during aerobic respiration.

> Cambridge International IGCSE Biology (0610) — 12.2 Aerobic respiration · Explain · 4 marks

## Mark scheme (4 marks)

1. Aerobic respiration takes place in the mitochondria
2. More mitochondria allows more aerobic respiration / more energy to be released
3. Glucose is broken down using oxygen during aerobic respiration
4. Carbon dioxide and water are produced as products of aerobic respiration

## Key terms

- [aerobic respiration](https://www.gradenine.co.uk/glossary/aerobic-respiration)
- [mitochondria](https://www.gradenine.co.uk/glossary/mitochondria)
- [glucose](https://www.gradenine.co.uk/glossary/glucose)
- [oxygen](https://www.gradenine.co.uk/glossary/oxygen)

## Related

- [Revision notes for Cambridge International IGCSE Biology (0610)](https://www.gradenine.co.uk/learn)
- [How to answer "Explain" questions](https://www.gradenine.co.uk/tools/command-word-cheatsheet)
- [Practice this with AI marking (free)](https://www.gradenine.co.uk/start)

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Source: [GradeNine](https://www.gradenine.co.uk/q/a-muscle-cell-requires-large-amounts-856e45ff) · Published by Druglandscape Ltd.