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Solution


Q.

Upon exposure to UV radiation, DNA stained with ethidium bromide will show               [2023]
1 bright yellow colour  
2 bright orange colour  
3 bright red colour  
4 bright blue colour  

Ans.

(2)

The DNA fragments separated by gel electrophoresis can be visualised after staining the DNA with ethidium bromide followed by exposure to UV radiations. Bands of DNA are seen as bright orange coloured bands in ethidium bromide stained gel exposed to UV light.