Question

which of the following dye is used to load the dna samples in gel? all above, orange dye, bromophenol blue, acridine orange, ethidium bromide

Explanation:

Ethidium bromide intercalates into DNA and is commonly used to visualize DNA in gel electrophoresis by making it fluorescent under UV - light. Bromophenol blue is a tracking dye to monitor the progress of the gel run, orange dye is not a standard DNA - loading dye, and acridine orange is used for other staining purposes not for simply loading DNA samples in gel.

Answer:

E. Ethidium bromide