The amino acid residue having animino side chain is____________?
Correct answer: D. Proline
- A. Lysine
- B. Histidine
- C. Tyrosine
- D. Proline
Explanation
Proline is called an imino acid because its side chain forms a ring with the amino nitrogen, making its amino group secondary. Lysine, histidine, and tyrosine have conventional amino groups.
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