Answer:
Cell membranes are crucial to the life of the cell. The plasma membrane encloses the cell, defines its boundaries, and maintains the essential differences between the cytosol and the extracellular environment.
(1) Cell membranes are thin enclosures that form closed boundaries. (2) Cell membranes are made up of lipids, proteins and carbohydrates. (3) Cell membranes consists of a phospholipid bilayer. (4) Cell membranes are held together by non-covalent interactions (5) Membranes are fluid-like structure