The cell membrane controls what enters and leaves the cell. The structure C is the correct presentation of the cell membrane.
What is a cell membrane?
The cell membrane, also known as the plasma membrane, is found in all cells and serves to separate the cell's inside from the outside world. The cell membrane is made up of a semipermeable lipid bilayer.
The cell membrane controls the flow of materials into and out of the cell.The cell membrane serves two purposes: first, like a barrier that keeps cell constituents in and undesired things out, and second, as a gate that allows needed nutrients to enter the cell and waste products to exit.
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