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Which of the following is a key regulatory protein involved in the lac operon of E. coli?
  • a)
    RNA polymerase
  • b)
    Repressor protein
  • c)
    Inducer molecule
  • d)
    Operator sequence
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
Which of the following is a key regulatory protein involved in the lac...
In the lac operon of E. coli, the repressor protein binds to the operator sequence and inhibits transcription when lactose is absent. The presence of an inducer molecule (C), such as lactose or allolactose, prevents the repressor protein from binding to the operator, allowing RNA polymerase (A) to transcribe the genes involved in lactose metabolism.
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