Which of these organelles manufactures proteins bound for secretion out of the cell?

In order to manufacture extracellular proteins for secretion, several organelles, including ribosomes, endoplasmic reticulum, Golgi apparatus, and secretory vesicles have to work together.

Golgi apparatus is the protein delivery center inside the cells

The function of Golgi apparatus is like the post office inside the cells. It usually locates close to the endoplasmic reticulum (ER). If you think of ER with ribosomes (rough ER) as the protein factory in the cells, the Golgi then takes over the logistic work. The Golgi apparatus receives the raw protein products from the ER, modifies them (for example, adding tags made by sugar chains), and exports the proteins to a variety of destinations.


[In this figure] The journey of protein synthesis and transportation.
After proteins are synthesized in the rough ER, they traveled to the Golgi for further glycosylation. Once they are done with the modification, proteins are packed into vesicles, called secretory vesicles. Then, they travel to the membrane and release by exocytosis.

Extended read:

Golgi apparatus function cover

Golgi Apparatus Function – the Post Office inside the Cells

  • What is Golgi apparatus?
  • What does the Golgi apparatus look like?
  • Where is Golgi apparatus located in a cell
  • How many Golgi apparatus can be found in one cell?
  • What is the biological function of Golgi apparatus?
  • How Golgi apparatuses divide during cell division?
  • Are there human diseases associated with Golgi apparatus dysfunction?
  • Where did the name “Golgi apparatus” come from?
  • How to see Golgi apparatus under a microscope?