Fig. 3: The Four Nitrogenous Bases 
    in RNA: Adenine, Guanine, Cytosine, and Uracil
  
 
 Adenine and guanine are also known 
  as purine bases; cytosine and uracil are also called pyrimidine bases. Each 
  ribonucleotide will contain one of these four bases. 
Illustration of the The Four Nitrogenous Bases in RNA: Adenine, Guanine, Cytosine, and Uracil .jpg by Gary E. Kaiser, Ph.D. 
     Professor of Microbiology, 
      The Community College of Baltimore County, Catonsville Campus
      This work is licensed under a Creative Commons Attribution 4.0 International License.
   Based on a work at https://cwoer.ccbcmd.edu/science/microbiology/index_gos.html.

Last updated: Feb., 2021
  Please send comments and inquiries to Dr. 
    Gary Kaiser