In the lac operon, promoter and operator refer to
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- binding sites for repressor and RNA polymerase
- binding sites for RNA polymerase and repressor
- binding sites for repressor and corepressor
- two binding sites for RNA polymerase
The Correct Option is B
Solution and Explanation
Step 1: Concept
The lac operon is a regulatory system in bacteria for lactose metabolism.
Step 2: Meaning
It consists of structural genes and regulatory DNA sequences (Promoter and Operator).
Step 3: Analysis
The Promoter is the DNA sequence where RNA polymerase binds to initiate transcription. The Operator is the DNA sequence where the lac repressor binds to block transcription.
Step 4: Conclusion
Therefore, the correct pair is RNA polymerase for the promoter and repressor for the operator. Final Answer: (B)
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