This biology video tutorial provides a basic introduction into nitrogenous bases. It explains the difference Nucleosides and Nucleotides. It also discusses the difference between Purines and Pyrimidines. It provides the structures of the five nitrogenous bases Adenine, Guanine, Cytosine, Uracil, and Thymine. DNA contains the nitrogenous bases A G T C while RNA contains the bases A G U C. My Website: https://www.video-tutor.net Patreon Donations: https://www.patreon.com/MathScienceTutor Amazon Store: https://www.amazon.com/shop/theorganicchemistrytutor Subscribe: https://www.youtube.com/channel/UCEWpbFLzoYGPfuWUMFPSaoA?sub_confirmation=1 Disclaimer: Some of the links associated with this video may generate affiliate commissions on my behalf. As an amazon associate, I earn from qualifying purchases that you may make through such affiliate links.