5. Consider the bases and the backbone. Which part is more hydrophobic? Hydrophilic/charged? Bases Backbone 5. Ethidium bromide (structure below) binds to DNA. It's used frequently in scientific research because it fluoresces under UV light, allowing the DNA to be visualized. You also must be very careful when handling it, as it is carcinog Looking at the structure, where in the DNA would you expect the ethidium bromide to bind? How do you think this contributes to its mutagenic/carcinogenic properties?.