system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: What is the difference between DNA and RNA, and how do the work in biology?
gpt
DNA is like a book in the reserve section of the library. It’s the full complete section of your entire genetic information that can’t leave the nucleus. 

RNA are the photocopies/notes of the book. You can take those anywhere and use them to study, and they are only going to be the pages that you actually need at that moment. 

Edit: Thanks everybody for the gold and the karma.