TY - CHAP M1 - Book, Section TI - NUCLEOSIDES, NUCLEOTIDES, DNA, AND RNA A1 - Janson, Lee W. A1 - Tischler, Marc E. PY - 2018 T2 - The Big Picture: Medical Biochemistry AB - Nucleosides and nucleotides are the fourth and final major group of biochemical molecules and are essential for numerous biological functions in humans, including maintaining and transferring genetic information, playing a major role in energy storage, and acting as signaling molecules. These molecules can be divided into two major families—purines, which include adenosine and guanine, and pyrimidines, which include cytosine, thymidine, and uracil. The unique structures and interactions of these molecules serve as the building blocks of RNA and DNA molecules and allow fundamental processes of gene replication and protein synthesis to occur. Many other functions of the various nucleosides and nucleotides will be explored in later chapters. SN - PB - McGraw-Hill Education CY - New York, NY Y2 - 2024/03/28 UR - accessmedicine.mhmedical.com/content.aspx?aid=1152118033 ER -