Question

lo 1.4: what is the function of the plasma membrane?
assists in cell division.
protects the cell from viruses and bacteria.
produces energy for the cell.
protects the cell from external damage.
regulates the movement of substances in and out of the cell.
helps in the synthesis of proteins.

Explanation:

The plasma membrane is a selectively - permeable barrier. Its main function is to regulate the movement of substances in and out of the cell, controlling what enters and leaves the cell environment. It is not directly involved in cell division, energy production, protein synthesis, or full - scale protection from viruses, bacteria, or external damage in the ways described in the other options.

Answer:

Regulates the movement of substances in and out of the cell.