Abstract: If I ask you ,what is DNA ...? You may reply that it is a hereditary material found in almost every organism,contains the genetic instructions of organism for its development or functions...etc. But today you could learn a history of DNA . I just tell you to pack your excitement to the top and let's know something new. The Discovery of DNA : There are so many people who had already guess that the discovery of the DNA was done by Watson and Francis Crick but it is fully wrong . In 1860s ,a Swiss chemist ,Johann Friedrich Miescher unknowingly discovered DNA . One day Johann planned to research on white blood cells' key components .He collected pus coated bandages from a nearby medical clinic . Johann use salt solution to understand more about WBC and further he added acid to the solution . Then a substance separated from the solution. Next he added alkali and it dissolved again .However during this process he understood that the substance has an u...
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