What functional group gives a positive test in the xanthoproteic test?

Aromatic amino acids, due to the nitration of amino acids.

Explanation:

Xanthoproteic test is a chemical test used to determine the amount of the protein in a solution. This is a type of qualitative test used for the determination of presence or absence of protein.

The xanthoproteic test is positive in case of aromatic amino acids only. The yellow color is formed in case of aromatic amino acids due to the formation of xanthoproteic acid. Phenylalanine, tyrsoine and tryptophan gives positive xanthoproteic test.

it marks things for degradation via the proteasome. it alters there celluar location.

in a chemical reaction, the atoms and molecules produced by the reaction are called products. no new atoms are created, and no atoms are destroyed. in a chemical reaction, reactants contact each other, bonds between atoms in the reactants are broken, and atoms rearrange and form new bonds to make the products.