DNA is made of nucleic acid, so defining DNA in detail needs the definition of nucleic acid of the first hand. The substance that was eventually proved to be genetic material was discovered in 1868, only four years after the announcement of laws of heredity by Mendel and 84 years before DNA became central issue of modern molecular biology following the publication of famous double helix model of DNA by Prominent Scientists Watson and Crick in 1953. By 1944 Capersson and Brachel independently suggested that the nucleic acids were directly connected with protein synthesis. In 1944 O.T. Avery, C.M. Macleod and M. Mc Carty conducted a remarkable experiment and suggested that bacteria could be genetically transformed by DNA. The nucleic Acids are of two types:
- Deoxyribonucleic Acid (DNA).
- Ribonucleic Acid (RNA).
Nucleic Acid