Which organelle is involved in packaging and shipping proteins?

The Golgi apparatus is the organelle that plays a crucial role in packaging and shipping proteins. It functions as the cell's processing and distribution center, modifying proteins received from the endoplasmic reticulum, sorting them according to their destinations, and packaging them into vesicles. These vesicles then transport the proteins to their proper locations within or outside the cell.

In contrast, the nucleus is primarily responsible for storing genetic material and controlling cellular activities. Mitochondria are known as the powerhouses of the cell, generating energy through respiration. The endoplasmic reticulum, while involved in protein synthesis and initial processing, does not perform the final packaging and shipping functions that are characteristic of the Golgi apparatus. Therefore, the Golgi apparatus stands out as the specialized organelle for these vital tasks in the cell's metabolism.