Which organelle is primarily involved in processing and packaging proteins for secretion in cells that produce lots of secreted proteins?

• A. Golgi Bodies
• B. Endoplasmic Reticulum
• C. Lysosome
• D. Ribosome

Answer: (A)

Proteins that are going to be secreted are handled through the secretory pathway, with the Golgi apparatus playing the key role in processing and packaging. After ribosomes on the rough endoplasmic reticulum make the proteins, they’re sent in vesicles to the Golgi, where they’re further modified and sorted for export. The Golgi then packages these proteins into secretory vesicles that travel to the plasma membrane and release their contents outside the cell. In cells that produce lots of secreted proteins, the Golgi is especially active to manage the high flow of cargo. The endoplasmic reticulum handles initial synthesis and folding, lysosomes break down waste, and ribosomes alone make proteins but don’t finalize them for secretion.