Which is/are true regarding the lipid bilayer? A. It is modeled as a capacitor in the equivalent circuit of a cell membrane. B. Ions can freely permeate and pass through the lipid bilayer. C. Protein mobility in the lipid bilayer can be restricted by the lipid composition or tethering to the cytoskeleton. D. All of the above. E. A & C only. Solution C.Protein mobility in the lipid bilayer can be restricted by the lipid composition or tethering to the cytoskeleton..