NEET BIOLOGY

Detailed explanation-1: -The cell wall is composed of a network of cellulose microfibrils and cross-linking glycans embedded in a highly cross-linked matrix of pectin polysaccharides. In secondary cell walls, lignin may be deposited.

Detailed explanation-2: -Cellulose is the structural constitu ent of the walls of the cells of green plants; it is a basically fibrous substance that gives the cell walls form and rigid ity.

Detailed explanation-3: -Bacterial cell walls are made of peptidoglycan (also called murein), which is made from polysaccharide chains cross-linked by unusual peptides containing D-amino acids. Bacterial cell walls are different from the cell walls of plants and fungi which are made of cellulose and chitin, respectively.

Detailed explanation-4: -Cellulose is the most essential structural component of plant cell walls and the most common macromolecule and organic substance on the Earth. Cellulose is made up of carbohydrates which is a polysaccharide structure. Polysaccharide is made up of long chains of many sugar molecules that are chemically linked together.