1.

Amino acids usually exist in the form of Zwitterions which consist of:

Answer»

The BASIC GROUP `-NH_2` and the ACIDIC group `-COOH`
The acid group `-NH_3^+` and the basic group`CO_2^-`
The acid group `CO_2^+`and the acidic group `NH_3^-`
No acidic or basic group

Answer :B


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