Most proteins have an isoelectric point ________ 7.
A)equal to
B)above
C)below
D)far above
E)at or above

Question

Quizplus · Accepted Answer

The isoelectric point (pI) of a protein is the pH at which the protein has no net charge, i.e., the protein is neutral. For most proteins, this point is below pH 7, so the best choice is C, "below." However, there are exceptions to this, including some basic proteins that have a pI above 7, and some acidic proteins that have a pI far below 7.

Most Proteins Have an Isoelectric Point ________ 7