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(A) $1$. Francois Jacob and Jacques Monod proposed the $Lac\,operon$ model in $1961$ to explain gene regulation in $E. coli$.$2$. Alec Jeffreys is kno

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Francois Jacob and Jacques Monod - $Lac\,operon$

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(A) $1$. Francois Jacob and Jacques Monod proposed the $Lac\,operon$ model in $1961$ to explain gene regulation in $E. coli$.$2$. Alec Jeffreys is known for developing $DNA$ fingerprinting,not for $Streptococcus\,pneumoniae$ (which was studied by Frederick Griffith).$3$. Matthew Meselson and $F$. Stahl provided experimental evidence for the semi-conservative replication of $DNA$ in $E. coli$,not $Pisum\,sativum$ (which was studied by Gregor Mendel).$4$. Alfred Hershey and Martha Chase conducted experiments with bacteriophages to prove that $DNA$ is the genetic material,not $TMV$ (Tobacco Mosaic Virus).

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Similar Questions

In the medium where $E$. coli was growing, lactose was added, which induced the lac operon. Then, why does the lac operon shut down some time after the addition of lactose in the medium?

Define an operon,give an example,and explain an inducible operon.

An inactive repressor produced by a regulator gene that does not block the operator site in the tryptophan operon is called:

Which of the following does not act as an inducer in the $lac$ operon?

Which of the following is a regulatory gene?

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