an ecoli strain is chromosomally lacZ- but a wildtype copy of entire lac operon is present on an F' plasmid which in turn has a penicillin resistant gene.now when ecoli is grown without penicillin,some colonies are penicillin sensitive and lac+.how?

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honcho4655 honcho4655

08-01-2020
Biology

contestada

an ecoli strain is chromosomally lacZ- but a wildtype copy of entire lac operon is present on an F' plasmid which in turn has a penicillin resistant gene.now when ecoli is grown without penicillin,some colonies are penicillin sensitive and lac+.how?

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devonmiles84 devonmiles84 · Answer 1 · 2020-01-13T12:41:44+01:00

Answer:

an ecoli strain is chromosomally lacZ- but a wildtype copy of entire lac operon is present on an F' plasmid which in turn has a penicillin resistant gene.now when ecoli is grown without penicillin,some colonies are penicillin sensitive and lac+.how? could be explained by an ecoli strain is chromosomally lacZ- but a wildtype copy of entire lac operon is present on an F' plasmid which in turn has a penicillin resistant gene.now when ecoli is grown without penicillin.

Explanation: