A nucleotide in the DNA chain consists of three parts

A nucleotide in the DNA chain consists of three parts - A...

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nucleotide  in the DNA chain consists of three parts: a nitrogenous  base, a phosphate group, and a molecule of deoxyribose.  The  nitrogenous bases  of each nucleotide chain are of two major  types:  purines  and  pyrimidines Purine bases have two fused rings of carbon and nitrogen atoms, 
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