Question

the function of the plasma membrane is:
○ all are correct
○ serves as a boundary between the celland its environment
○ determines which substances enter and leave the cell
○ contains protein receptor sites which determine how the cell interacts with its environment

Explanation:

• The plasma membrane acts as a cell - environment boundary.
• It is selectively permeable, controlling substance entry/exit.
• It has protein receptors for cell - environment interaction. So all options about its function are correct.

Answer:

A. all are correct