3.
Which of the following statements about isoeletric focusing is correct?
A:
Proteins separated by isoelectric focusing cannot be tested for biological activity.
B:
Proteins separated by isoelectric focusing can be tested for biological activity
C:
The separation of proteins by isoelectric focusing is only based on charge.
D:
The separation of proteins by isoelectric focusing is only based on size.
The answer is:
B