According to the most current model of the plasma membrane,

A) cholesterol forms the innermost layer of the membrane.
B) proteins are free to move about within a double layer of phospholipids.
C) phospholipids and cholesterol form a single lipid bilayer.
D) the membrane is a rigid unchanging structure.
E) the membrane is impermeable to all other molecules.

Phospholipids

A class of lipids that are a major component of all cell membranes and can form lipid bilayers because of their amphiphilic characteristic.

Plasma Membrane

The organic membrane distinguishing the inner part of all cells from the outer environment, managing the flow of substances to and from the cells.

Cholesterol

A lipid molecule essential for the structure of cell membranes and precursor of steroid hormones, vitamin D, and bile acids.