What is the purpose of ethidium bromide in DNA electrophoresis?
A)To tag DNA fragments so they can be viewed under UV light
B)To introduce mutations into the DNA
C)To fragment the DNA before separating the pieces by size
D)To join fragments of DNA together

Question

Quizplus · Accepted Answer

Ethidium bromide is used as a fluorescent tag that binds to DNA, allowing the DNA fragments to be visualized under UV light after they have been separated by electrophoresis.

What Is the Purpose of Ethidium Bromide in DNA Electrophoresis