Distinguish between inducible operons and repressible operons and explain how they work. Describe the three types...

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Biology

Distinguish between inducible operons and repressible operonsand explain how they work. Describe the three types of prokaryoticgenetic recombination (conjugation, transformation, andtransduction). Explain how recombination might interfere with themetabolic functions of operons, such as the lac operon or trpoperon of E. coli.

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Distinguish between inducible operons and repressible operons and explain how they work An operon is a cluster of coordinately regulated genes Inducible operons are switched on in presence of a metabolite a small molecule undergoing metabolism that regulates the operon Eg the lac operon get induced in the presence of lactose through the action of allolactose a metabolic byproduct However repressible operons are turned off in response to a small regulatory molecule Eg the trp operon is repressed in the presence of tryptophan Type of Operon Presence of Effect Metabolite Operon Inducible Metabolite ON Lactose Lac Repressible Metabolite OFF Trytophan Trp Control of an operon is a type of gene regulation that enables organisms to regulate the expression of various genes depending on environmental conditions Operon regulation can be either negative or positive by induction or repression In negative inducible operons a regulatory repressor protein is generally bound to the operator that prevents the transcription of the genes on the operon In presence of inducer molecule it binds to the repressor and modify its conformation which makes it unable to bind to the operator This allows for expression of the operon The lac operon is a negatively controlled inducible See Answer

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