Q8 of 44 Page 79

A mixture of fragmented DNA was electrophoresed in an agarose gel. After staining the gel with ethidium bromide, no DNA bands were observed. What could be the reason?

After staining the agarose gel with Ethidium bromide,if no DNA bands are observed it may occur due to following reasons:

•May be the isolated DNA has been degraded during the isolation process.


•May be the DNA is not exposed to UV radiations after staining it with Ethidium bromide .


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