Here's why:

* Nucleus: The nucleus is the control center of the cell. It houses the cell's DNA, which contains the genetic instructions for making proteins. The process of making RNA from DNA is called transcription, and it occurs within the nucleus.

* Ribosomes: Ribosomes are the cellular machinery that reads the RNA instructions and assembles proteins. While ribosomes use RNA, they don't store or make it. They are found in the cytoplasm, the fluid surrounding the nucleus.

Let me know if you have any other questions!