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

Options

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

Answer

B

Explanation

`**` the separated DNA fragments can be visualised only after staining the DNA with a compound known as ethidium bromide followed by exposure to ultraviolet radiation (we cannot see pure DNA fragments in the visible light and without staining)
`**` Bright organe coloured bands of DNA in a ethidium bromide stained gel exposed to UV light is observed