M.Sc. Bio-Chemistry (PU-CET P.G) 2019 Panjab University Entrance Exam With Answers

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35.

The α-carboxylic acid group of Glycine amino acid has pK value of 2.35 while for its α- amino group pK is 9.78. identify, which species of glycine would predominate at pH below 2.35;

A: +H3NCH2COO-
B: H2NCH2COOH
C: H2NCH2COO-
D: +H3NCH2COOH

The answer is: D