Define 'Operon'. Explain the regulation of gene expression in
prokaryotes with the help of Lac Operon Model.
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made up of linked genes which is thought to regulate other genes responsible for protein synthesis.
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- In genetics, an operon is a functioning unit of DNA containing a cluster of genes under the control of a single promoter.
- In lac operon, lactose acts as an inducer. If lactose is provided in the medium for the bacteria, the regulatory gene is activated. The inducer will bind to the repressor protein and render it inactive which allows transcription of the operon. Thus, the lac operon is negatively regulated in this case.
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