Phospholipids of the Plasma Membrane are Arranged

Question

Phospholipids of the plasma membrane are arranged
A) around a central layer of cholesterol.
B) in a single layer with polar heads facing outwards.
C) as a bilayer with their nonpolar tails sandwiched between the polar heads.
D) as a bilayer with their polar heads sandwiched between the nonpolar tails.
E) as a bilayer with the polar heads facing the nonpolar tails.

Accepted Answer

Phospholipids in the plasma membrane are arranged in a bilayer with their nonpolar tails sandwiched between the polar heads. This creates a hydrophobic environment in the center of the membrane that allows it to be selectively permeable.