9.Biotechnology Principals and Process
medium

ઈથીડીયન બ્રોમાઈડથી અભિરંજિત કરેલ $DNA$ પર $UV$ વિકિરણો પાડવામાં આવે ત્યારે તે બતાવશે -

A

ચળકતો નારંગી રંગ

B

ચળકતો લાલ રંગ

C

ચળકતો વાદળી રંગ

D

ચળકતો પીળો રંગ

(NEET-2023)

Solution

Option $(1)$ is the correct answer because in recombinant $DNA$ technology the separated $DNA$ fragments can be visualised only after staining the $DNA$ with a substance known as ethidium bromide followed by exposure to $U.V.$ radiation. You can see bright orange coloured bands of $DNA$ in an ethidium bromide stained gel exposed to $U.V.$ light.

Standard 12
Biology

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