The chitinous exoskeleton of arthropods is formed by the polymerisation of
A
keratin sulphate and chondroitin sulphate
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B
D-glucosamine
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C
N- acetylglucosamine
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D
lipoglycans
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Solution
The correct option is C N- acetylglucosamine Chitin is the second most abundant organic substance. It is a structural homopolysaccharide. It is present as structural component in exoskeleton of insects and fungal cell walls. Chemically chitin is a polymer of N- acetylglucosamine. It is a polymer of carbohydrate (polysaccharide) that consists of nitrogen.