Gene regulation governing the lactose operon | vedclass

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(D) $lac$ operon regulation is described as negative and inducible.$1$. Negative control: The $lac I$ gene produces a repressor protein that binds to

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negative and inducible because the repressor protein prevents transcription.

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(D) $lac$ operon regulation is described as negative and inducible.$1$. Negative control: The $lac I$ gene produces a repressor protein that binds to the operator region,preventing $RNA$ polymerase from transcribing the structural genes. This keeps the operon in an 'off' state under normal conditions.$2$. Inducible: The presence of an inducer (allolactose) binds to the repressor protein,causing a conformational change that prevents the repressor from binding to the operator. This allows transcription to proceed.$3$. Therefore,because the default state is 'off' due to a repressor and it is turned 'on' by an inducer,it is classified as negative and inducible.

Gene regulation governing the lactose operon of $E. coli$ that involves the $lac I$ gene product is:

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During $DNA$ transcription,$mRNA$ is usually single-stranded. However,sometimes an $RNA$ molecule is produced that is complementary to the $mRNA$. This is called ...... and its function is to ...... .

Which of the following statements about the $lac$ operon is correct?

Genes that are involved in turning on or off the transcription of a set of structural genes are called:

In the $lac$ operon,the structural genes are switched off when:

Which of the following is not a component of the $Operon$ model?

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