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BIO NMDCAT Cytoplasmic Organelles
nmdcat.online July 4, 2026

30. The initial step of N-linked protein glycosylation occurs exclusively in the rough endoplasmic reticulum via the structural transfer of a pre-assembled oligosaccharide from

A. Free cytoplasm sugars
B. Dolichol phosphate
✓
C. UDP-glucose carriers
D. Golgi cisternal receptors

📝 Explanation

A core carbohydrate tree is built on dolichol phosphate, a membrane lipid anchor, before being transferred to an asparagine residue of the growing peptide.

📖 Additional Information

  • Free cytoplasm sugars
  • Dolichol phosphate
  • UDP-glucose carriers
  • Golgi cisternal receptors

A core carbohydrate tree is built on dolichol phosphate, a membrane lipid anchor, before being transferred to an asparagine residue of the growing peptide.

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