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BIO NMDCAT Carbohydrates
nmdcat.online June 27, 2026

Regarding the structure of chitin, the polysaccharide forming the exoskeleton of arthropods, its monomer is a modified glucose where the C-2 hydroxyl is replaced by

A. A hydrogen atom, forming deoxyglucose
B. An acetylamino group (-NHCOCH₃)
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C. A carboxyl group, forming glucuronic acid
D. A sulfate group, forming glucosamine sulfate

📝 Explanation

Chitin is a linear homopolymer of N-acetyl-D-glucosamine, which is glucose with an N-acetylamino group at the C-2 position. It is linked by β-1,4 glycosidic bonds, analogous to the structure of cellulose.

📖 Additional Information

  • A hydrogen atom, forming deoxyglucose
  • An acetylamino group (-NHCOCH₃)
  • A carboxyl group, forming glucuronic acid
  • A sulfate group, forming glucosamine sulfate

Chitin is a linear homopolymer of N-acetyl-D-glucosamine, which is glucose with an N-acetylamino group at the C-2 position. It is linked by β-1,4 glycosidic bonds, analogous to the structure of cellulose.

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