Here's a breakdown:
* Proteins are synthesized by ribosomes in the cytoplasm.
* Some proteins are destined for export outside the cell or for use in other organelles.
* These proteins enter the endoplasmic reticulum (ER), where they may undergo initial modifications, such as folding and glycosylation.
* From the ER, proteins travel to the Golgi apparatus. This organelle is a stack of flattened membrane-bound sacs called cisternae.
* Within the Golgi, proteins are further modified, sorted, and packaged into transport vesicles.
* These vesicles transport the modified proteins to their final destinations, either outside the cell (exocytosis) or to other organelles within the cell.
In essence, the Golgi apparatus acts like a "post office" for proteins, ensuring they are properly processed and delivered to their correct locations.
