The isoelectric point is
A) the pH at which a substance has no net charge
B) the pH at which a substance has a net positive charge
C) the pH at which a substance has a net negative charge
D) the pH at which a substance has no charge groups of any kind

Question

Quizplus · Accepted Answer

The isoelectric point is the pH at which a substance (typically an amino acid or a protein) has no net electrical charge. At this pH, the amounts of positive and negative charges on the molecule are equal, resulting in a net zero charge.

The Isoelectric Point Is