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Discovery of the Structure of DNA.
Member rating: No Rating | Words: | Submitted: Thu Feb 26 2004
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Discovery of the Structure of DNA Most biological experiments are done with samples of living matter- cells, tissues, whole organisms or extracts of these materials. Only a few experiments are done with mathematical or physical models of biological components. Occasionally, however, a model experiment gives an insight that would be difficult to obtain in any other way. This was true of the discovery of the structure of DNA. A crucial experiment was done by James Watson in 1952 using nothing more complicated than chemical models cut out of cardboard. What Was Known About the Structure of DNA in Late 1952 By 1952 conventional laboratory experiments had shown the following: * DNA was the molecule of heredity: it had been shown that transferring DNA into bacteria could change them genetically. This made the solving of the DNA structure one of the top priorities in biology * DNA was known to be composed of phosphate,...
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