What Is Responsible for the Unequal Distribution of Ions Across

Multiple Choice

What is responsible for the unequal distribution of ions across a membrane, thereby causing a charge?

A) the semipermeable membrane
B) the concentration of carrier proteins in the membrane
C) the concentration of impermeable charged molecules
D) the concentration of ions seeking equilibrium with respect to their charge
E) the ability of permeable ions to pass through a membrane