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12th Biology 2013 Set2 Delhi Board Paper Solution

Question 18

(a) Explain how to find whether an E.coli bacterium has transformed or not when a recombinant DNA bearing amplicillin resistant gene is transferred into it.
(b) What does the amplicilling resistant gene act as in the above case?

Answer
(a) If E. Coli has been transformed then these ‘transformed E.coli’ cells would be able to grew on ampicillin medium.
 
(b) Ampicillin resistant gene acts as a selectable marker in this case.