Question

3. According to advertisements, a commercial hair dressing contains “protein”. Which of the following would be...

3. According to advertisements, a commercial hair dressing contains “protein”. Which of the following would be the best test to perform on the product to check this claim?

a. The biuret test

b. The Millon test

c. The Hopkins-Cole test

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Answer #1

Hair contains keratin protein which is completely insoluble in hot or cold water. Million's test is suitable for soluble proteins.

Hopkins-cole test is used to test for tryptophan which is uncommon in keratin protein. Thus, the biuret test is best suitable to check for the hair protein.

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