Observation of Griffith

DNA as Carrier of Genetic Information

Although DNA was discovered in 1869 by Friedrich Miescher as a new, acidic, phosphorus containing substance made up of very large molecules that he named “nuclein”, its biological role was not recognized. In 1889 Richard Altmann introduced the term “nucleic acid”. By 1900 the purine and pyrimidine bases were known. Twenty years later, the two […]