Which statement best describes the function of the plasma membrane? It forms a barrier that controls what enters and leaves the cell.

It packages and transports proteins.

It stores genetic information.

It converts glucose into a usable form of energy.

A. It forms a barrier that controls what enters and leaves the cell.

Explanation:

The plasma membrane (or cell membrane) helps to seperate the interior contents from the outside enviroment, while also controlling the transport of materials inside and outside of the cell. Here's an image of this if it helps!