Amino Sugars in Biological Processes
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Questions and Answers

Which monosaccharide serves as a building block for the synthesis of glycosaminoglycans (GAGs) in the extracellular matrix, playing a key role in joint health and cartilage formation?

  • N-acetylgalactosamine
  • Galactose
  • Glucosamine (correct)
  • Sialic acid
  • Which monosaccharide is commonly found in O-linked glycoproteins, where it forms the initial sugar in the O-glycan chain, influencing protein stability and function?

  • Glucosamine
  • Sialic acid
  • Galactose
  • N-acetylgalactosamine (correct)
  • Which monosaccharide is often found at the outermost end of glycan chains in glycoproteins and glycolipids, playing a critical role in cell surface recognition, immune responses, and protection against pathogens, as well as modulating cell adhesion and signaling processes?

  • N-acetylgalactosamine
  • Galactose
  • Sialic acid (correct)
  • Glucosamine
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