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Discussion

Vesicles budding from the endoplasmic reticulum towards the Golgi are coated with

  • A.COPI protein
  • B.clathrin protein
  • C.dynein protein
  • D.COPII protein

Answer: D

Correct answer: COPII protein

COPII coats vesicles moving forward from the endoplasmic reticulum to the Golgi. COPI coats the retrograde traffic returning from the Golgi to the reticulum, and clathrin coats vesicles budding from the trans Golgi network and from the plasma membrane in endocytosis. The three coats therefore mark the three legs of the secretory and retrieval pathway.

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