BIOMOLECULES AND ENZYMES

Detailed explanation-1: -The chitinous exoskeleton of the insects is the result of the polymerization of N-acetyl glucosamine, which is a derivative of glucose It is also a characteristic component of the cell wall of fungi, the radulae of molluscs, and the beaks and internal shells of cephalopods including squid and octopuses.

Detailed explanation-2: -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-3: -Arthropod Armor The bodies of arthropods are supported, not by internal bones, but by a hardened exoskeleton made of chitin, a substance produced by many non-arthropods as well.

Detailed explanation-4: -An arthropod’s skeleton is usually made of chitin, but some arthropods have an exoskeleton made from both chitin and calcium carbonate.

Detailed explanation-5: -Chitin is a major constituent of the exoskeleton, or external skeleton, of many arthropods such as insects, spiders, and crustaceans. Exoskeletons made of this durable and firm compound support and protect the delicate soft tissues of these animals, which lack an internal skeleton.