Definitions of A DNA

  1. A deoxyribonucleotide polymer that is the primary genetic material of all cells. Eukaryotic and prokaryotic organisms normally contain DNA in a double- stranded state, yet several important biological processes transiently involve single- stranded regions. DNA, which consists of a polysugar- phosphate backbone possessing projections of purines ( adenine and guanine) and pyrimidines ( thymine and cytosine), forms a double helix that is held together by hydrogen bonds between these purines and pyrimidines ( adenine to thymine and guanine to cytosine).