Here's why:
* Protein Synthesis: Proteins are initially synthesized by ribosomes.
* Transport to Golgi: These proteins are then transported to the Golgi apparatus in transport vesicles.
* Modification and Sorting: The Golgi apparatus further modifies and sorts the proteins. It adds sugars, lipids, and other molecules to the proteins and packages them into new vesicles based on their destination.
* Vesicle Formation: The Golgi then buds off these vesicles, which carry the processed proteins to different parts of the cell or for secretion outside the cell.
So, while ribosomes are responsible for protein synthesis, the Golgi apparatus is crucial for the packaging and delivery of these proteins.