Question

DNA strands on a gel stained with ethidium bromide when viewed under UV radiation, appear as :

• A. Bright blue bands
• B. Yellow bands
• C. Bright orange bands
• D. Dark red bands

Answer 1

The correct option is C Bright orange bands

Ethidium bromide is a dye used in gel electrophoresis which is a technique used to separate DNA fragments.

Ethidium bromide intercalates between the base pairs of double stranded DNA and appear as bright orange coloured bands when exposed to UV light.