Amino acids usually exist in the form of Zwitter ions. This mean that they consist of

Options

A. the basic group `-NH_(3)^(+)` and the acidic group `COO^(-)`
B. the basic group `-NH_(3)^(-)` and the acidic group `-COOH`
C. the basic group `-COO^(-)` and the acidic group `-NH_(3)^(+)`
D. (a) and (b)

Answer

C

Explanation

According to Lewis acid and base theory, acid is a substance which is capable of accepting a pair of electron to form co-ordinate bond and a base is a substance which is capable of donating a pair of electron to form a co-ordinate bond.
`-COO^(-) ` is base group and `-NH_(3)^(+)` is an acidic group.