So we have these RNA DNA molecules, which are nucleic acids. And what that means is they basically play the role of storing genetic information and passing genetic information down from one individual to the offspring. Now, these RNA and DNA molecules basically contain sugar components. In the case of RNA, we have the ribosugh. In the case of DNA we have the deoxyribose sugar. And deoxy simply means on the second carbon, we don't have a hydroxyl group.