NEET BIOLOGY

Detailed explanation-1: -Chitin exists in the shells of arthropods such as crabs, shrimps, and insects and is also produced by fungi and bacteria. Chitosan, the partially N-deacetylated analog of chitin, is a heteropolysaccharide consisting of d-glucosamine and N-acetyl-d-glucosamine.

Detailed explanation-2: -Chitin is one of the most important biopolymers in nature. It is mainly produced by fungi, arthropods and nematodes. In insects, it functions as scaffold material, supporting the cuticles of the epidermis and trachea as well as the peritrophic matrices lining the gut epithelium.

Detailed explanation-3: -Chitin, a (1, 4)-linked homopolymer of N-acetylglucosamine, is a simple polysaccharide that is represented in the cell walls of all fungi studied to date [1, 2].

Detailed explanation-4: -Chitin, which occurs in nature as ordered macrofibrils, is the major structural component in the exoskeletons of the crustaceans, crabs and shrimps, as well as the cell walls of fungi.

Detailed explanation-5: -Chitin and cellulose are both made from glucose monomers, while keratin is a fibrous protein. The various structural polymers arose early in the evolution of life, because they are seen only in certain groups. Cellulose is exclusive to plants, keratin to animals, and chitin to the arthropods, mollusks and fungi.