BIOMOLECULES AND ENZYMES

Detailed explanation-1: -Chitin, the second most abundant natural polysaccharide, after cellulose, is a linear polymer composed of repeating (1, 4)-N-acetylglucosamine units (Figure 18). Chitin exists in the shells of arthropods such as crabs, shrimps, and insects and is also produced by fungi and bacteria.

Detailed explanation-2: -Fungi initially evolved in the primitive seas, using chitin as the main polysaccharide of the cell wall, as well as arthropods.

Detailed explanation-3: -Chitin is the second most abundant biodegradable polymer produced in nature after cellulose. It is an acetylated polysaccharide composed of N-acetyl-d-glucosamine groups linked by (1→4) linkages and exists as ordered crystalline microfibrils shown in Fig.

Detailed explanation-4: -Chitin, a linear polysaccharide found in fungi, crustaceous, insects, and parasites, is a water insoluble polymer composed of units of 1, 4-linked N-acetylglucosamine.

Detailed explanation-5: -Chitin is a structural constituent of extracellular matrices including the cuticle of the exoskeleton and the peritrophic matrix (PM) of the midgut in arthropods.