BIOMOLECULES AND ENZYMES

Detailed explanation-1: -Chitin is the most abundant aminopolysaccharide polymer occurring in nature, and is the building material that gives strength to the exoskeletons of crustaceans, insects, and the cell walls of fungi.

Detailed explanation-2: -Chitin is a polysaccharide abundant in nature, which constitutes the exoskeleton of arthropods, such as insects and crustaceans.

Detailed explanation-3: -The exoskeleton of insects is composed of hard chitin, which is a polymer of acetylglucosamine and quite resistant to many chemicals. Insectivorous reptiles however have chitinolytic enzymes. Chitinase is secreted by the stomach and pancreas and occurs only in chitin eating species.

Detailed explanation-4: -Chitin in Fungi In fungi, chitin is used to create a cell wall. Much like cellulose in plants, the chitin is deposited extracellularly with proteins and other molecules. This forms a rigid cell wall between cells, which help the organisms retain their shape.

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.