# Describe the functions of the nucleus, mitochondria, ribosomes and cell membrane in a eukaryotic cell.

> Pearson Edexcel International GCSE Biology (4BI1) — 2.2 Cell structure · Describe · 4 marks

## Mark scheme (4 marks)

1. The nucleus contains the genetic material / controls the activities of the cell
2. Mitochondria are the site of respiration
3. Ribosomes are the site of protein synthesis
4. The cell membrane is a partially permeable barrier that controls / regulates what enters and leaves the cell

## Key terms

- [nucleus](https://www.gradenine.co.uk/glossary/nucleus)
- [mitochondria](https://www.gradenine.co.uk/glossary/mitochondria)
- [ribosomes](https://www.gradenine.co.uk/glossary/ribosomes)
- [cell membrane](https://www.gradenine.co.uk/glossary/cell-membrane)

## Related

- [Revision notes for Pearson Edexcel International GCSE Biology (4BI1)](https://www.gradenine.co.uk/learn)
- [How to answer "Describe" 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/describe-the-functions-of-the-nucleus-10f3eec1) · Published by Druglandscape Ltd.