The fluid-mosaic model describes the structure of cell membranes as a flexible layer made of lipid molecules interspersed with large protein molecules that act as channels through which other molecules enter and leave the cell.
A two-layered arrangement of phosphate and lipid molecules that form a cell membrane.
These are permanently attached within the plasma membrane and perform various functions such as transporting nutrients into cells.
These proteins are temporarily attached either to lipid bilayer or integral proteins; they play key roles in cellular processes.