JEE Main Chemistry question

Which of the following is not an α-amino acid?

(A)Cysteine
(B)Proline
(C)TrypsinCorrect
(D)Serine

Answer: (C)

Solution

Cysteine, proline and serine are each single α-amino acid molecules, with an amino (or imino, for proline) group on the carbon adjacent to the carboxyl group.

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Question ID VK-150793