Question

DNA staining by ethidium bromide is followed by the exposure to UV rays. Now DNA is seen as bands of :

• A. Blue colour
• B. Orange colour
• C. Red colour
• D. Both B and C

Answer 1

The correct option is B

Explanation of the correct option:

1. The separated DNA fragments can be visualised after staining the DNA with ethidium bromide followed by exposure to UV rays. ​
2. Bright orange coloured bands of DNA are seen in a gel.

Final answer: DNA staining by ethidium bromide is followed by the exposure to UV rays. Now DNA is seen as bands of orange colour.