Which organism was used by Beadle and Tatum to propose the one gene-one enzyme hypothesis?

  • A
    $E. coli$
  • B
    Nostoc
  • C
    Drosophila
  • D
    Neurospora

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

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

Jacob and Monod studied lactose metabolism in $E. coli$ and proposed the operon concept,which is applicable for:

In the $lac$ operon,if a nonsense mutation occurs in the $lac\, y$ gene,which enzymes will be synthesized?

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Which of the following pairs does not exhibit complementarity?

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