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A)Why do nucleic acids move towards the positive electrode in agarose gel electrophoresis at pH8? B)....

A)Why do nucleic acids move towards the positive electrode in agarose gel electrophoresis at pH8?

B). In general, when analyzing DNA in agarose gel, DNA size marker is also applied to one of the wells. In this experiment, it doesn’t require to load DNA size marker when analyze your isolated plasmid by agarose gel electrophoresis, why?

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