The Only FALSE Statement About Membrane Proteins Is

The only FALSE statement about membrane proteins is:

A) Some membrane-bound proteins are anchored to the lipid bilayer via a covalent attachment to the membrane lipid phosphatidyl inositol.
B) Carbohydrate on membrane lipids and proteins is symmetrically distributed across the plasma membrane.
C) Peripheral membrane proteins are asymmetrically distributed across the plasma membrane.
D) transport proteins generally span the lipid bilayer multiple times.
E) The membrane-spanning domain of a transmembrane protein is usually an alpha-helix.