DNA or deoxyribonucleic acid is the genetic material that is present in all the living cells except a few viruses which contain RNA as their genetic material.
This DNA is passed on from one generation to the next.
The structure of DNA is very complex and it is synthesized in the nucleus with the help of DNA polymerase.
Any defect in the process of replication of DNA can lead to mutation and it may result in a genetic deformity.
The three units of DNA are:
Nitrogenous bases: Adenosine, thymine, guanine, and cytosine are the four nitrogenous bases.
Deoxyribose sugar is a carbohydrate molecule with five carbons in it.