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BIO NMDCAT Carbohydrates
nmdcat.online June 27, 2026

A distinctive feature of the carbohydrate hyaluronic acid, a glycosaminoglycan, that contributes to its function as a lubricant in synovial fluid is its

A. Highly branched structure with multiple sulfate groups
B. Ability to form a highly hydrated, viscous gel due to its large, extended, and negatively charged structure
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C. Hydrophobic core that repels water from the joint surface
D. Covalent attachment to collagen fibers, forming a rigid scaffold

📝 Explanation

Hyaluronic acid is a linear, unbranched polymer with repeating disaccharide units containing glucuronic acid (negatively charged). The polymer chains are long and rigid, and they trap a large volume of water, forming a viscous solution that acts as an excellent shock absorber and lubricant.

📖 Additional Information

  • Highly branched structure with multiple sulfate groups
  • Ability to form a highly hydrated, viscous gel due to its large, extended, and negatively charged structure
  • Hydrophobic core that repels water from the joint surface
  • Covalent attachment to collagen fibers, forming a rigid scaffold

Hyaluronic acid is a linear, unbranched polymer with repeating disaccharide units containing glucuronic acid (negatively charged). The polymer chains are long and rigid, and they trap a large volume of water, forming a viscous solution that acts as an excellent shock absorber and lubricant.

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