Ethidium Bromide or "EtBr" is a fluorescent nucleic acid tag commonly used in molecular biology laboratories to detect DNA and RNA. When exposed to UV light EtBr will fluoresce with a orange/red colour, this fluorescence will intensify 20-fold once bound to DNA. Although no confirming scientific studies on the subject, Ethidium Bromide is feared to be toxic due to the way it insets itself in D...