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Question

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

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

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.


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