Protein is used for growth and repair of cells.

Meat

Title: To test milk for protein

Apparatus: Milk, test tube, sodium hydroxide, copper sulphate

Method:

1. Place some milk in a test tube.
2. Add a few drops of sodium hydroxide.
3. Add a few drops of copper sulphate solution.

Result: A violet colour is produced.

Conclusion: There is protein in milk.

Calcium