Major difference in RNA and DNA?

DNA is Deoxyribonucleicacid and RNA is Ribonucleicacid, the physical differences is that the Deoxy in DNA represents a sugar with one less Oxygen then the sugar Ribose in RNA. Also each as the same nitrogenous bases with the exception of Uracil (RNA) and Thyamine in (DNA) are the only difference. DNA never leaves the nucleus, RNA is the code that is created from reading DNA strand to code for proteins and what not. There are several different types of RNA, messanger RNA which reads the DNA inside the nucleus and carries it out to the transfer RNA which reads the message and retrieves the necessary Aminoacids to build a protein. Also there is ribosomal RNA which is the sight for the actual protein synthesis to take place (there are also several enzymes which play a crucial role in this process)....this is very general, but thats basically it