Final answer:
The Golgi apparatus is responsible for the modification, sorting, and packing of proteins from the rough ER, including glycosylation and the creation of vesicles for transport inside or outside the cell.
Step-by-step explanation:
The Golgi apparatus modifies proteins received from the rough ER via glycosylation and also sorts and packages them into vesicles to be shipped off to another destination. This organelle is much like a post office and is responsible for organizing, modifying, packaging, and tagging products, either to transport to other areas of the cell or to export from the cell through exocytosis. Proteins that are enzymatic may be packaged as new lysosomes or sent for fusion with existing lysosomes.