The right option is; a double layer of phospholipids
The cell membrane is made up of a double layer of phospholipids.
The cell membrane is a biological membrane that surrounds a cell and separates the contents of the cell from its outside environment. The cell membrane is composed of a double layer of lipids with embedded proteins. The cell membrane protects the cell, gives the cell its structure, and controls the movement of substances in and out of the cell.
