Why Are Proteins Separated on an SDS Polyacrylamide Gel Equally

Multiple Choice

Why are proteins separated on an SDS polyacrylamide gel equally attracted to the positive electrode?

A) They carry a relatively uniform positive charge distribution
B) They carry a relatively uniform negative charge distribution.
C) They are all the same molecular weight.
D) They are all the same size.
E) They all have the same degree of hydrophobicity.