1.

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 ?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» Correct Answer - A
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`


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