It acts as a molecular sieve,controlling the passage of large molecules.

What is the cell membrane composed of?

Assertion : $A$ cell membrane shows fluid behaviour.
Reason : $A$ membrane is a mosaic or composite of diverse lipids and proteins.

In human beings,the membrane of the erythrocytes has approximately ...... percent protein and ....... percent lipids.

Explain: On what basis are substances transported by the plasma membrane/cell membrane?

Ion carriers are located in