# Explain how a DNA molecule is able to copy itself accurately.

> Eduqas GCSE Biology — 2.3.1 DNA structure · Explain · 4 marks

## Mark scheme (4 marks)

1. The two strands of the DNA molecule separate / unzip
2. Each original strand acts as a template for a new strand
3. Free DNA bases pair up with complementary bases on each template strand
4. Two identical DNA molecules are produced / each new molecule contains one original strand and one new strand

## Key terms

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

## Related

- [Revision notes for Eduqas GCSE Biology](https://www.gradenine.co.uk/learn)
- [How to answer "Explain" questions](https://www.gradenine.co.uk/tools/command-word-cheatsheet)
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Source: [GradeNine](https://www.gradenine.co.uk/q/explain-how-a-dna-molecule-is-29c61114) · Published by Druglandscape Ltd.