NEET Biology question
According to the Lac operon concept, which functional unit of the bacterial genetic material is responsible for suppressing the activity of the operator gene in the absence of lactose?
Answer: (A)
Solution
In the Lac operon, the regulator (i) gene continuously produces the repressor protein, which in the absence of lactose binds to the operator gene and blocks RNA polymerase from transcribing the structural genes; the promoter is merely the RNA-polymerase binding site
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