AP BIOLOGY

Detailed explanation-1: -It separates the interior of the cell from the outside environment. The cell membrane comprises a lipid layer that is semi-permeable. The cell membrane is involved in the regulation of the transport of materials from and outside the cell. It is present in all cells.

Detailed explanation-2: -The cell membrane, also called the plasma membrane, is found in all cells and separates the interior of the cell from the outside environment.

Detailed explanation-3: -All cells have an outer plasma membrane that regulates not only what enters the cell, but also how much of any given substance comes in. Unlike prokaryotes, eukaryotic cells also possess internal membranes that encase their organelles and control the exchange of essential cell components.

Detailed explanation-4: -A living cell cannot survive without a membrane. Apart from acting as a barrier and attachment site, cell membranes play important roles in living cells. Membranes have carrier proteins for transport, cell membranes also contain enzymes for a certain reactions.

Detailed explanation-5: -The most fundamental role of the cell membrane is to protect the cell. This includes protecting it from potentially harmful substances and molecules. Cell membranes do more than control the movement of substances in and out of cells.