WHAT IS DNA???????????????

dna is a genetic material which is the most important unit or a most important molecule for the genetic system.almost the entire genetic system will depends upon the dna molecule.dna is called as deoxyribonucleic acid mainly.this is a polymer chain of nucleotide molecules.these are the absic units of the dna.these are also called as the polymer chains of nucleotides these will be formed by ab ester bond.