Q.

The plasmid pBR322 contains a PstI restriction site within the ampicillin resistance gene (ampR). When Pstl is employed to insert a desired gene responsible for beta-galactosidase production, what would be the outcome once the recombinant plasmid is introduced into an E.coli strain

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a

The E.coli will lose the ability to resist ampicillin due to disruption of the ampR gene..

b

The E.coli will not gain the novel function of producing beta-galactosidase 

c

The insertion of the gene will result in the lysis of the E.coli cells

d

The E.coli will be transformed, exhibiting resistance to ampicillin and producing beta-galactosidase simultaneously.

answer is A.

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Detailed Solution

Ampicillin resistance is lost due to insertional inactivation. Therefore, E.coli will lose the ability to resist ampicillin due to disruption of the ampR gene.

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