Cell recognition and adhesion are facilitated by components of plasma membrane. These components are generally

Options

A. proteins
B. lipids
C. Both (a) and (b)
D. glycoproteins and glycolipids

Answer

D

Explanation

In the cell membrane, oligosaccharides do not occur freely but are attached to the external surface of phospholipids and proteins forming glycolipids and glycoproteins respectively. They form cell coat (glycocalyx) which acts as recognition centre, site for attachment and provides antigen specificity to cell membranes, blood grouping and matching of tissues in transplantation of organs.