Isoelectric point of an amino acid is the pH at which the amino acid molecules

Options

A. migrate to the anode
B. migrate to the cathode
C. would not migrate either to the anode or to the cathode and exist as neutral dipolar ions
D. move alternatively to the anode and the cathode

Answer

C

Explanation

Isoelectric point of an amino acid is due to Zwitter ion. Zwitter ion is dipolar structure having both cation and anion part together. However at some value of pH, concentration of cation formed and anion formed become equal and that point is isoelectric point.