Final answer:
Transport vesicles from the ER travel to the Golgi apparatus, where they fuse with the cis face, get processed, and then bud off from the trans face to reach their final destinations within the cell.
Step-by-step explanation:
After leaving the ER, many transport vesicles travel to the Golgi apparatus. The Golgi apparatus serves as a critical station for the sorting, packaging, tagging, and distributing of lipids and proteins. These vesicles specifically fuse with the cis face of the Golgi apparatus, which is the receiving side nearest to the ER.
As the molecules move through the Golgi apparatus, they are modified, most frequently by the addition of short sugar molecule chains. This modification facilitates the sorting of these molecules, enabling them to be properly routed to their final destinations. Once the proteins and lipids have been processed, they are packaged into new transport vesicles that bud off from the trans face, the side of the Golgi apparatus opposite the cis face, and are then directed to their respective locations within the cell.