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Glycosylation of proteins begins in the

  • A.Golgi apparatus stack
  • B.lysosome interior
  • C.nucleus of the cell
  • D.endoplasmic reticulum

Answer: D

An initial sugar tree is added in the lumen of the reticulum and is then trimmed and extended in the Golgi. The pattern of sugars ends up marking the protein's destination and its identity. Sugar patterns also help other cells recognise it at the surface.

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