The components of a nucleoside
   include  a  nitrogenous  base and a pentose sugar (deoxyribose in DNA,
   ribose in RNA).
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   The carbon atoms on the sugar are given prime numbers: 1' through 5'.
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   The  nitrogenous  base  is either a pyrimidine - Cytosine (C), Thymine
   (T), and Uracil (U) - or a purine - Adenine (A) and Guanine (G).
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   Thymine is found in DNA (Deoxyribonucleic Acid), while Uracil is found
   in RNA (Ribonucleic Acid).