Base | nucleic acid | Britannica (original) (raw)

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classification of nucleic acids

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  In nucleic acid: Basic structure
  …four of five possible nitrogen-containing bases: adenine (A), guanine (G), cytosine (C), thymine (T), and uracil (U). A and G are categorized as purines, and C, T, and U are collectively called
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function in coding

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  In heredity: Structure and composition of DNA
  …are two kinds of nitrogenous bases: purines and pyrimidines. The purines are adenine (A) and guanine (G) in both DNA and RNA; the pyrimidines are cytosine (C) and thymine
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structure of DNA

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  In DNA
  …and one of four nitrogenous bases: two purines (adenine and guanine) and two pyrimidines (cytosine and thymine). The nucleotides are joined together
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