Question:
Explain the mechanism of switching ‘on’ of the structural genes of lac operon.
Explain the mechanism of switching ‘on’ of the structural genes of lac operon.
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The lac operon illustrates an inducible system where genes are transcribed only in the presence of lactose.
Updated On: Jan 21, 2025
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Solution and Explanation
In the presence of lactose:
Lactose binds to the repressor protein, inactivating it.
The repressor can no longer bind to the operator region.
RNA polymerase transcribes the structural genes, producing enzymes for lactose metabolism.
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