In the lac operon,which molecule binds to the | vedclass

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Question

(A) In the $lac$ operon,the $RNA$ polymerase enzyme binds to the promoter site to initiate the transcription of structural genes $(lacZ, lacY, lacA)$.

Vedclass · Accepted Answer

$RNA$ polymerase

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(A) In the $lac$ operon,the $RNA$ polymerase enzyme binds to the promoter site to initiate the transcription of structural genes $(lacZ, lacY, lacA)$.When the inducer (lactose) is present,it binds to the repressor protein,preventing it from binding to the operator,thus allowing $RNA$ polymerase to transcribe the genes.Therefore,the molecule that binds to the promoter site to facilitate transcription is $RNA$ polymerase.

In the $lac$ operon,which molecule binds to the promoter site?

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In an $E. coli$ strain,the $i$ gene gets mutated such that its product cannot bind the inducer molecule. If the growth medium is provided with lactose,what will be the outcome?

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Assertion $(A):$ Regulation of $lac$ operon by repressor is referred to as negative regulation.
Reason $(R):$ Repressor protein binds to the operator region and prevents $\text{RNA}$ polymerase from transcribing the operon.

What are promoter,operator,and structural genes?

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