1.

The α-amino acids have a carboxyl group with a pK around __________ , and an amino group with a pK near __________ .

A. 6.5, and 8.0
B. 1.1, and 12.1
C. 2.2, and 9.4
D. 3.3, and 10.5
Answer» D. 3.3, and 10.5


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