17. What is the primary function of the cell membrane?
A. It separates the intracellular components from the extracellular space and
allows transport of materials into and out of the cell.
B. It provides rigidity and protects the cell from its environment.
C. It packages and transports proteins and lipids for transport to designated
locations in the cell.
D. It digests foreign materials and unwanted organelles in the cytoplasm.
E. It provides storage space for food or water.