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adenosine triphosphate. (ATP) (ÉdÄn`ÉsÄn trÄ«'fÅs`fÄt) , organic compound composed of adenine adenine, organic base of the purine family.n metabolism, ATP is generated from adenosine diphosphate and inorganic phosphate mainly as a consequence of energy-yielding oxidation-reduction reactions. In respiration, ATP is generated during the transport of electrons from the substrate to oxygen via the cytochrome system.
DNA is usually double stranded and most cellular RNA is single stranded. 1)In DNA the pentose sugar is deoxyribose.Whereas in RNA the pentose sugar is ribose. 2)In DNA the common organic bases are adenine,guanine,cytosine and thymine.Whereas in RNA the common organic bases are adenine,guanine,cytosine and uracil.