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2015-11-17T22:36:32+05:30

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It is a double helix structure. 
With phosphodiester bonds. There are two chains of DNA linked together through bonds between Nitrogenous compounds which are Adenine, Thyamine, Guanine and Cytosine. It consists of nucleosides made up of sugar and phosphate. When a nitrogenous compound is added to the nucleoside it is called a nucleotide. In a single DNA strand there are 4 pairs of nucleotides. 
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