Target Exam

CUET

Subject

Chemistry

Chapter

Organic: Biomolecules

Question:

Which of the following amino acids contains only one amino group?

Options:

Glutamine

Asparagine

Lysine

Leucine

Correct Answer:

Leucine

Explanation:

Lysine, asparagine and glutamine all contain two amino (NH2) groups, of which one is a part of the side chain. Leucine has a purely alkyl side chain and the only amino group it has is one the α-carbon.