BIOMOLECULES AND ENZYMES

Detailed explanation-1: -However, to solely use the qualitative test to determine the presence of this specific amino acid residi D This is because the test will yield a positive result for any compound that has a phenol structure.

Detailed explanation-2: -Millon’s Test Millon’s test is given by any compound containing a phenolic hydroxy group. Consequently, any protein containing tyrosine will give a positive test of a pink to dark-red colour.

Detailed explanation-3: -Millon’s test is a test specific for tyrosine, the only amino acid containing a phenol group, a hydroxyl group attached to a benzene ring.

Detailed explanation-4: -Xanthoproteic test is used to detect amino acids containing an aromatic nucleus (tyrosine, tryptophan and phenylalanine) in a protein solution which gives yellow color nitro derivatives on heating with conc. HNO3. The aromatic benzene ring undergoes nitration to give yellow colored product.

Detailed explanation-5: -Positive result: A positive result in the Millon’s test is demonstrated by the formation of a red or pink colored precipitate.