#11) Big Idea 2 Term 9: Chitin

Chitin is a long chain of glucose that forms a hard substance, often found in mushrooms, exoskeletons of arthropods, and beaks and shells of cephalopods. Chitin is made of units of N-acetylglucosamine and consists of linkages similar to those found is cellulose. The exoskeleton of Tibicen linnei (depicted above) is made of chitin.