A)Proteins of the plasma membrane can form a channel through the membrane.
B)Proteins of the plasma membrane can initiate the replication of the genetic material.
C)Proteins of the plasma membrane can bind to a substance to carry it through the membrane.
D)Proteins of the plasma membrane can act as a receptor for substances external to the cell.
E)Proteins of the plasma membrane can increase the rate of a chemical reaction.

A)The movement of molecules from an area of their higher concentration to an area of their lower concentration.
B)The movement of water across a semipermeable membrane from an area of higher water concentration to an area of lower water concentration.
C)The movement of molecules from an area of their lower concentration to an area of their higher concentration.
D)The movement of water across a semipermeable membrane from an area of lower water concentration to an area of higher water concentration.
E)The movement of a substance against its concentration gradient through the release of energy from ATP.

A)an extracellular matrix
B)plasmodesmata
C)gap junctions
D)adhesion junctions (desmosomes)
E)tight junctions