What three cell parts act like assembly line to produce and distribute proteins?

The three cell parts that act like an assembly line to produce and distribute proteins are the ribosomes, the endoplasmic reticulum (ER), and the Golgi apparatus. Ribosomes synthesize proteins by translating messenger RNA (mRNA). The rough ER, studded with ribosomes, processes and folds these proteins, while the Golgi apparatus modifies, sorts, and packages them for distribution to their final destinations within or outside the cell.