Final answer:
The Golgi apparatus is the organelle that prepares proteins for specific jobs by modifying, sorting, and packaging them for use inside or outside of the cell.
Step-by-step explanation:
The organelle that prepares proteins for specific jobs within a eukaryotic cell is known as the Golgi apparatus. After the ribosomes on the rough endoplasmic reticulum (RER) synthesize proteins, these proteins are sent to the Golgi apparatus. The Golgi apparatus is akin to a cellular post office; it modifies, sorts, and packages proteins for secretion or for use within the cell. It also plays a crucial role in lipid transport and lysosome creation. This organelle is especially prominent in cells that have high secretory demands, such as antibody-secreting cells in the immune system.