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Topic last updated: 25 Oct 2021
    • Ico Science Applied Science (applied)
    • Biologybiology Biology
    • 14-16
    • 55

Enzymes and their use

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Enzymes in digestion

In the digestive system, enzymes break down large insoluble molecules (e.g. starch, proteins and fats) into small soluble molecules that can be absorbed into the blood from the small intestines.


  Large insoluble molecule   Type of enzyme   Small soluble product
  Carbohydrate (e.g. starch)   Carbohydrase   Simple sugars (e.g. glucose)
  Protein   Protease (e.g. pepsin)   Amino acids
  Fat/Lipids   Lipase   Glycerol and fatty acids


You can learn more about the role of enzymes in digestion in the diet and digestion topic.

Enzymes in the digestive system

Enzymes in the digestive system