Which of the following statements best decribes how proteins and enzymes move within a cell?
a. the movement of proteins and enzymes within a cell is facilitated by membrane receptors.
b. the movement of proteins and enzymes within a cell is facilitated by special organelles called transport receptors.
c. the movement of proteins and enzymes within a cell is facilitated by intracellular receptors.
d. the movement of proteins and enzymes within a cell is facilitated by special organelles called magneto receptors.