Main component of fungal cell wall is:

Question

Accepted Answer

The correct option is 4:

The cell wall is a crucial structural component that provides support, shape, and protection to fungal cells. Unlike plant cell walls, which are primarily composed of cellulose, fungal cell walls are characteristically made of chitin. Chitin is a complex carbohydrate, specifically a nitrogen-containing polysaccharide, derived from units of N-acetyl-D-glucosamine. This polymer forms strong microfibrils that provide remarkable rigidity and strength to the fungal cell wall, making it resistant to osmotic lysis and various environmental stresses. The presence of chitin is a defining feature that distinguishes fungi from plants and other eukaryotic organisms.

The incorrect option is 1: Cellulose.
Cellulose is the primary component of plant cell walls, providing structural support to plants. While both cellulose and chitin are polysaccharides, their chemical structures and the organisms in which they are found differ significantly. Fungi do not utilize cellulose as the main building block for their cell walls.

The incorrect option is 2: Pectin.
Pectin is another complex polysaccharide, but it is typically found in the middle lamella and primary cell walls of plants, where it helps in cell adhesion and acts as a cementing agent. Pectin is not a major structural component of fungal cell walls.

The incorrect option is 3: Dextrin.
Dextrin is a low-molecular-weight carbohydrate produced by the hydrolysis of starch. It is primarily used as a thickening agent or a food additive and does not serve as a structural component of cell walls in either fungi or plants.