Question

How will you test the presence of protines in food by brainly by an activity?

Answer 1

The presence of proteins in a given food stuff can be tested as follows:

1. Take 2 mL of the given food-stuff solution (or suspension) in a test-tube.

2. Add a little of dilute sodium hydroxide solution till the mixture clears.

3. Then add two or three drops of copper sulphate solution and shake the test tube.

4. If a violet colour appears in the solution, then protein is present in the given food stuff.