In aqueous solution amino acids moslty exit as

Options

A. `NH_(2)-CHR-CO OH`
B. `NH_(2)-CHR-CO O^(-)`
C. `overset(+)(N)H_(3)CHRCO OH`
D. `H_(3)N^(+) CHRCO O^(-)`

Answer

D

Explanation

In aqueous solution , amino afcids mostly exists as zwitter ion.
`underset("Zwitter ion")(overset(N)(N)H_(3)-overset(R)overset(|)(CH)-CO O^(-))`