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- https://bio.libretexts.org/Courses/Ouachita_Baptist_University/Reyna_Cell_Biology/01%3A_(T1)_Basic_Cell_Chemistry_-_Chemical_Compounds_and_their_Interactions/1.05%3A_NucleotidesNucleotides, the building blocks of RNA and DNA, are themselves composed of a pentose sugar attached to a nitrogenous base on one side and a phosphate group on another. The sugar is either the 5-carbo...Nucleotides, the building blocks of RNA and DNA, are themselves composed of a pentose sugar attached to a nitrogenous base on one side and a phosphate group on another. The sugar is either the 5-carbon sugar ribose or its close cousin, deoxyribose (the “deoxy” refers to a “missing” hydroxyl group on the 2-carbon, which has an H instead). The attached nitrogenous base can be a purine, which is a 6-member ring fused to a 5-member ring, or a pyrimidine, which is a single 6-membered ring.
- https://bio.libretexts.org/Courses/Coastline_College/Book-_Cells_-_Molecules_and_Mechanisms_(Wong)/02%3A_Basic_Cell_Chemistry_-_Chemical_Compounds_and_their_Interactions/2.05%3A_NucleotidesNucleotides, the building blocks of RNA and DNA, are themselves composed of a pentose sugar attached to a nitrogenous base on one side and a phosphate group on another. The sugar is either the 5-carbo...Nucleotides, the building blocks of RNA and DNA, are themselves composed of a pentose sugar attached to a nitrogenous base on one side and a phosphate group on another. The sugar is either the 5-carbon sugar ribose or its close cousin, deoxyribose (the “deoxy” refers to a “missing” hydroxyl group on the 2-carbon, which has an H instead). The attached nitrogenous base can be a purine, which is a 6-member ring fused to a 5-member ring, or a pyrimidine, which is a single 6-membered ring.
