# Amylase is an enzyme found in saliva that breaks down starch into maltose. Explain why amylase continues to work after it has broken down a starch molecule.

> Cambridge International IGCSE Biology (0610) — 5.1 Enzymes · Explain · 4 marks

## Mark scheme (4 marks)

1. The enzyme is not changed/used up by the reaction
2. The product is released from the active site
3. The active site is free/available to bind to another substrate molecule
4. A new enzyme-substrate complex can form

## Key terms

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

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Source: [GradeNine](https://www.gradenine.co.uk/q/amylase-is-an-enzyme-found-in-46ab3e60) · Published by Druglandscape Ltd.