Which of the following is a function of the Golgi apparatus?

The Golgi apparatus plays a crucial role in the post-translational modification and processing of proteins synthesized in the endoplasmic reticulum. After proteins are produced, they are transported to the Golgi apparatus, where they undergo modifications such as glycosylation, phosphorylation, and sulfation. These modifications are essential for the proteins to attain their proper structure and function.

Furthermore, the Golgi apparatus is responsible for sorting and packaging these modified proteins into vesicles, which can either be directed to various cellular locations or secreted outside the cell. This process is vital for the delivery of proteins that are essential for various cellular functions, signaling, or structural roles.

The functions characterized by the other options—protein storage, protein synthesis, and ribosome assembly—do not accurately represent the primary role of the Golgi apparatus. Protein storage typically occurs in other organelles such as lysosomes or in the cytosol. Protein synthesis primarily takes place in ribosomes, which may be free in the cytoplasm or bound to the rough endoplasmic reticulum. Ribosome assembly occurs in the nucleolus of the cell, not within the Golgi apparatus. Thus, the correct understanding of the Golgi apparatus's function is critical in grasping the overall process