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    What are the four kinds of nitrogen bases in DNA?

    Class-12 Biology

    Asked By Raj Kapoor

    4 ANSWERS

    • Nitrogen Bases of DNA - These are rather complex single or double ring
      structures containing nitrogen and are attached to the carbon of the
      sugar. Nitrogen bases are of two types based on the number of rings.



      Purines

      Purines are double ringed nitrogenous bases which are linked to sugar
      by using nitrogen present at 9' -position. Adenine and guanine come
      under this group.
    • Adenine, guanine, cytosine, and thymine are the four nitrogen bases in DNA.
    • adenine and thymine are always together

      and cytosine and guanine are always together

    • The four nitrogen bases are:
      Adenine
      Guanine
      Cytosine
      Thymine

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