This Is a Certified Answer

Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
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. 
1 4 1