At which pH does a protein have a net positive charge?
A) at its isoelectric point
B) never
C) at the pH above its isoelectric point
D) at the pH below its isoelectric point

Question

Quizplus · Accepted Answer

At the pH below its isoelectric point, a protein has a net positive charge because more of its acidic groups are protonated and fewer of its basic groups are deprotonated, leading to an overall positive charge.

At Which PH Does a Protein Have a Net Positive