What is the function of the Golgi apparatus?

The Golgi apparatus is crucial in the post-translational modification, sorting, and packaging of proteins and lipids that have been synthesized in the endoplasmic reticulum. After proteins are produced in the rough endoplasmic reticulum, they are transported to the Golgi apparatus, where they undergo modifications such as glycosylation, phosphorylation, or cleavage. Once these modifications are complete, the Golgi apparatus sorts the proteins and directs them to their appropriate destinations, whether that be secretion outside the cell, incorporation into the cell membrane, or transport to lysosomes.

This sorting and modifying function is essential for the proper functioning of the cell, ensuring that proteins are delivered to the right locations and perform their intended roles. In summary, the role of the Golgi apparatus is integral to cellular operations, making the function of sorting and modifying proteins the correct answer.