Which one of the following amino acid does not give the ninhydrin test?

Question

Which one of the following amino acid does not give the ninhydrin test? (A) Aspartic acid (B) Glycine (C) Proline (D) Lysine

Tardigrade Admin · Accepted Answer

Ninhydrin test is highly specific for the primary amines. All α-amino acids give a blue-purple colour with ninhydrin except proline being a secondary amine which gives a yellow orange colour.

Q. Which one of the following amino acid does not give the ninhydrin test?

Aspartic acid

Glycine

Proline

Lysine

Ninhydrin test is highly specific for the primary amines. All $α$ -amino acids give a blue-purple colour with ninhydrin except proline being a secondary amine which gives a yellow orange colour.