Here's why:
* ER's Role: The ER is where proteins are synthesized and begin to fold.
* Golgi's Role: The Golgi apparatus is like a processing and packaging center. It receives proteins from the ER, modifies them further (e.g., adding sugars, lipids), and sorts them into vesicles for transport to their final destination.
The journey from the ER to the Golgi:
1. Transport Vesicles: Proteins leave the ER in small membrane-bound sacs called transport vesicles.
2. Golgi Arrival: These vesicles fuse with the Golgi apparatus.
3. Processing and Sorting: The protein moves through the Golgi compartments, undergoing modifications and sorting.
4. Final Destination: Ultimately, the protein is packaged into new vesicles that bud off from the Golgi and travel to their target location (e.g., cell membrane, lysosomes, etc.).
