Question

How can we check the presence of protein in the given food sample?

Answer 1

Question

How can we check the presence of protein in the given food sample?

Answer :

We can test the presence of protein in a food sample by an experiment.

Aim of the experiment : To test the presence of protein in the given food sample.

Materials required : mortar and pestle, test tube, dropper, concentrated nitric acid.

Procedure :

• Crush some bean seeds in a mortar and pestle.
• Make a suspension using water.
• Take little suspension in test tube.
• Add few drops of concentrated nitric acid.

Observation : Observe the colour change.

If the colour changes in to yellow, the given food sample contains protein.

Answer 2

to check the presence of protein in a food sample use biuret reagent

Biuret test is used to check presence of protein. if the colour of solution turn purple that means protein is present in a sample

let me clear you how it works

biuret reagent is made up of NaOH and copper sulphate.

in the presence of peptide bond copper ion forms a co-ordinate compound in alkaline condition which is a colourful (purple) compound