A)They can move laterally along the plane of the membrane.
B)They frequently flip-flop from one side of the membrane to the other.
C)They occur in an uninterrupted bilayer, with membrane proteins restricted to the surface of the membrane.
D)They are free to depart from the membrane and dissolve in the surrounding solution.
E)They have hydrophilic tails in the interior of the membrane.

A)The cell membrane forms a border between one cell and another in tightly packed tissues such as epithelium.
B)Cell membranes communicate signals from one organism to another.
C)The two sides of a cell membrane face different environments and carry out different functions.
D)The "innerness" and "outerness" of membrane surfaces are predetermined by genes.
E)Proteins can only be associated with the cell membranes on the cytoplasmic side.

A)in the cytoplasm by free ribosomes.
B)by ribosomes in the nucleus.
C)by ribosomes bound to the rough endoplasmic reticulum.
D)by ribosomes in the Golgi vesicles.
E)by ribosomes bound to the inner surface of the plasma membrane.