Amino acids exist in Zwitter ion form. What is the structure of glycine at pH = 4?
A. `H_3N^(o+)-CH_2-COO^-`
B. `H_3N^(o+)-CH_2-COOH`
C. `H_2N - CH_2- COOH`
D. `H_2N - CH_2-COO^-`

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1 Answers

Correct Answer - A
`underset(.^(o+)NH_3)underset|(CH_2)-COO^(-) hArr undersetunderset(NH_2)|CH_2-COOH`

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