The cell membrane, or plasma membrane, is made up of a lipid bilayer in which hydrophilic heads face outward and hydrophobic tails face inward.
This arrangement within the cell membrane allows it to
A.
keep out all viral and bacterial infections.
B.
fuse with ribosomes during DNA replication.
C.
absorb water from the cytoplasm whenever necessary.
D.
control the movement of substances in and out of the cell.