The Permeability of the Plasma Membrane to Mineral Ions

Multiple Choice

The permeability of the plasma membrane to mineral ions

A) is not influenced by channels formed by proteins.
B) is the same in all cell types.
C) is affected by differences in electrical charge on the two sides of the membrane.
D) is zero in all living cells.
E) is only possible because of the hydrophobic interior of the lipid bilayer.