Nucleoside nucleotide, the fundamental building block of DNa ● 2-deoxyribose HO: CH base H phosphoric acid phosphoester bond O—P-OcH H nucleotide (damglycosidic bond Copyright o 2004 Pearson Education, Inc, publishing as Benjamin CummingsNucleoside & Nucleotide, the fundamental building block of DNA glycosidic bond phosphoester bond