Replication of Bacteria -- In 1953 James Watson and Francis Crick predicting the double helix structure of DNA also described that how DNA is copied during replication .
Separating the strands of the double helix provide two templates for the synthesis of new complementary strands . The new complementary strands is copied after replication each double strands DNA includes one parental or old strand and one is new strand .
Matthew Meselson and Franklin Stahi ,gave the information from the experiment on bacteria E.coli DNA replication . They used N^15 heavy isotope in a medium which incorporated Nitrogenous bases in the DNA .
Which are known as parental DNA .
The labelled the parental DNA ,E coli culture was then shifted to a medium containing N^14 and allowing to grow for generation .
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