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Where is an ‘operator’ located in a prokaryote DNA? How does an operator regulate gene expression at transcriptional level in a prokaryote? Explain. |
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Answer» The operator region is located adjacent to promoter elements or prior to structural gene. The operator regulates switching on and off the operon when the repressor binds to the operator region it is switched off and prevents transcription. In the presence of inducer the repressor is inactivated and operator allows RNA polymerase to access the promoter. The operon is switched on and transcription proceeds. |
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