# Describe the relationship between genes, chromosomes, DNA and the nucleus in a human body cell.

> AQA A-Level Biology (7402) — 3.4.1 DNA, Genes and Chromosomes · Describe · 5 marks

## Mark scheme (5 marks)

1. The nucleus contains chromosomes
2. Chromosomes are made of / consist of DNA
3. DNA is a long molecule / DNA molecules are very long
4. A gene is a small section of DNA / a gene is part of a chromosome
5. Each gene codes for / determines a specific protein (or a specific characteristic / trait)

## Key terms

- [gene](https://www.gradenine.co.uk/glossary/gene)
- [chromosome](https://www.gradenine.co.uk/glossary/chromosome)
- [DNA](https://www.gradenine.co.uk/glossary/dna)
- [nucleus](https://www.gradenine.co.uk/glossary/nucleus)

## Related

- [Revision notes for AQA A-Level Biology (7402)](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-relationship-between-genes-chromosomes-45e92edc) · Published by Druglandscape Ltd.