Assume that a particular amino acid has an isoelectric point of 6.0. In a solution at pH 1.0, which of the following species will predominate ?

Options

A. `H_(3)overset(+)(N)overset(R)overset(|)(CH)CO_(2)H`
B. `H_(2)Noverset(R)overset(|)(CH)CO_(2)H`
C. `H_(3)overset(+)(N)overset(R)overset(|)(CH)CO_(2)^(-)`
D. `H_(2)Noverset(R)overset(|)(CH)CO_(2)^(-)`

Answer

A

Explanation

In acidic medium Zwitter ion convert into
`overset(o+)(NH_(3))-underset(R)underset(|)(CH)-COoverset(Θ)(O)+H^(o+) rarr overset(o+)(NH_(3))-underset(R)underset(|)(CH)-COOH`