What is the basic unit of nucleic acids?

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(B) Nucleic acids,such as $DNA$ and $RNA$,are polymers of nucleotides.Each nucleotide consists of three components: a nitrogenous base,a pentose sugar

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Nucleotide

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(B) Nucleic acids,such as $DNA$ and $RNA$,are polymers of nucleotides.Each nucleotide consists of three components: a nitrogenous base,a pentose sugar (ribose or deoxyribose),and a phosphate group.Nucleosides consist only of a nitrogenous base and a pentose sugar,lacking the phosphate group.Therefore,the fundamental repeating unit or monomer of a nucleic acid is the nucleotide.

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