Key Stage 3
Meaning
Proteins are molecules in our diet that are used by our bodies for growth and repair.
About Proteins
- There are many different proteins.
- Protein is used to build muscles and repair injuries.
- Not enough protein can cause a disease called Kwashiorkor.
Protein
We can eat any of these foods to get enough protein.
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| Meat provides lots of protein for a balanced diet.
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You can help keep your diet balanced by eating lots of different beans.
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Nuts are the seeds of trees and are part of a balanced diet.
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There are many different kinds of peas that can help make sure you have a balanced diet.
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Testing For Protein
- Adding protein to Biuret solution will cause the solution to turn purple.
Method
- 1. Take a small sample of food and dissolve it in water.
- 2. Add some Biuret to the solution.
- 3. If it turns from blue to purple then the food contained protein.
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| This Biuret has turned purple, indicating protein is present.
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