give a test of proteins​

Answer:

Food Test 2: Protein - Biuret solution

Biuret solution is used to identify the presence of protein. Biuret reagent is a blue solution that, when it reacts with protein, will change color to pink-purple.

What to do.

To a test tube, add 40 drops of liquid to be tested.

If testing more than one liquid, label each test tube with a marker.

Add 3 drops of Biuret reagent solution to each test tube. Shake gently to mix.

Note any color change. Proteins will turn solution pink or purple.

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