# Describe what happens to a protein-rich food, such as a piece of chicken, as it passes through the human digestive system.

> WJEC GCSE Biology (Wales) — 1.3.2 Digestion and absorption · Describe · 4 marks

## Mark scheme (4 marks)

1. Protein is digested / broken down by protease enzymes
2. Protein is broken down into amino acids
3. Digestion occurs in the stomach and/or small intestine
4. Amino acids are absorbed into the blood through the wall of the small intestine

## Related

- [Revision notes for WJEC GCSE Biology (Wales)](https://www.gradenine.co.uk/learn)
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