A) keratin sulphate and chondroitin sulphate
B) D-glucosamine
C) N-acetyl glucosamine
D) lipoglycans
Correct Answer: C
Solution :
The chitinous exoskeleton of arthropods is formed by the polymerisation of N-acetyl glucosamine, a 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.
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