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BIO NMDCAT Conjugated molecules
nmdcat.online July 3, 2026

19. The structural distinction between a glycoprotein and a proteoglycan is that a proteoglycan contains

A. More lipid than carbohydrate
B. A higher percentage of carbohydrate, primarily composed of long glycosaminoglycan chains
✓
C. No covalent bonds between its parts
D. An exclusively intranuclear function

📝 Explanation

Proteoglycans are mostly carbohydrate by weight (80%–95%), containing long unbranched GAG chains, unlike standard glycoproteins.

📖 Additional Information

  • More lipid than carbohydrate
  • A higher percentage of carbohydrate, primarily composed of long glycosaminoglycan chains
  • No covalent bonds between its parts
  • An exclusively intranuclear function

Proteoglycans are mostly carbohydrate by weight (80%–95%), containing long unbranched GAG chains, unlike standard glycoproteins.

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