Which of the following is a function of proteins in the plasma
membrane?
Choose one or more:
A. serve as anchors to attach the cell to the extracellular
matrix
B. transmit extracellular signals to the cell interior
C. generate the energy required for lipids to diffuse within the
membrane
D. allow specific ions to cross the plasma membrane, thereby
controlling its electrical properties
E. transport molecules across the membrane
The hint says: Membrane proteins serve many functions. Each
type of cell membrane contains a different set of proteins,
reflecting the specialized functions of the particular membrane.
Consider how membrane proteins might help cells acquire nutrients,
send and receive signals, and establish the connections that allow
them to form tissues and organs.