structure of DNA 

DNA is a ribose sugar which is abbrivated as Deoxyribonocleiac Acid.
its very important to code for the genetic information from parents to offosprings.

 

The basic building block of DNA was known as nucleotide. consisting of the five car bons sugars.Ther are two types of  nitrogenous bases present in a nucleic acid,Prymidines which contain a single ring,and Purines which contain a two rings.

DNA contain two different type of Pyrimidines that is thymine and cytosine.

Two different types of purines that is Guanine and Adinine

These nucloeride is covlentely linked to one another to form a Linear strand, with alternating sugar and phosphate group joined by 3-5 phosphodiester  bond.

X-ray analysis shows diffraction analysis indicating that the distance between the nucleotide of the stack was 3.4nm.