Final answer:
Ribosomes in eukaryotic cells are found in the cytoplasm and on the rough endoplasmic reticulum (ER). Proteins made on the ribosomes on the rough ER are modified, packaged into vesicles, and sent to the Golgi apparatus.
Step-by-step explanation:
Ribosomes are non-membrane bound organelles where proteins are made in both eukaryotic and prokaryotic cells. In eukaryotic cells, ribosomes can be found both in the cytoplasm and on the rough endoplasmic reticulum (ER). The rough ER is continuous with the nuclear envelope and has ribosomes on its surface. Many proteins are made on the ribosomes on the rough ER. These proteins enter the ER, where they are modified, packaged into vesicles, and sent to the Golgi apparatus.