Question

Which of the following is a test for proteins?

• A. Biuret Test
• B. Iodine Test
• C. Emulsion test
• D. None of the above

Answer 1

The correct option is A

Biuret Test

Explanation for correct option:

A. Biuret test

• A Biuret test is used to check the presence of the peptide bond in the given substance.
• The biuret reagent is pale blue in color.
• When the biuret reagent is mixed with the protein, it detects the presence of protein by changing the color of the solution to purple color.

Explanation for incorrect options:

B. The iodine test is used for the presence of starch in carbohydrates.

C. Emulsion test is used to detect the presence of lipids in a sample.

D. Option A is correct, thus this option stands incorrect.

Hence, the correct option is A i.e. Biuret test is a test for proteins.