Chitin is a ______.

Chitin is a ______.

• A. Nucleic acid
• B. Polysaccharide
• C. Protein
• D. Lipid

Answer: (B)

Chitin is a polysaccharide. It’s a long chain polymer made from sugar units, specifically N-acetylglucosamine, linked by beta-1,4 glycosidic bonds. This carbohydrate backbone and those strong interchain hydrogen bonds give chitin its tough, rigid structure, which is why it serves as a key structural material in the exoskeletons of arthropods and in fungal cell walls. The acetylated amino group differentiates it from simple sugars like cellulose and contributes to its properties. It isn’t a nucleic acid, a protein, or a lipid, which are built from nucleotides, amino acids, and fatty acids/glycerol respectively.

Chitin is a polysaccharide. It’s a long chain polymer made from sugar units, specifically N-acetylglucosamine, linked by beta-1,4 glycosidic bonds. This carbohydrate backbone and those strong interchain hydrogen bonds give chitin its tough, rigid structure, which is why it serves as a key structural material in the exoskeletons of arthropods and in fungal cell walls. The acetylated amino group differentiates it from simple sugars like cellulose and contributes to its properties. It isn’t a nucleic acid, a protein, or a lipid, which are built from nucleotides, amino acids, and fatty acids/glycerol respectively.