Which of the following acts as an inducer for | vedclass

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(A) In the $lac$ operon of $Escherichia$ $coli$,the $i$ gene codes for a repressor protein that binds to the operator region and prevents transcriptio

Vedclass · Accepted Answer

Lactose

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(A) In the $lac$ operon of $Escherichia$ $coli$,the $i$ gene codes for a repressor protein that binds to the operator region and prevents transcription.When lactose is present in the medium,it enters the cell and is converted into its isomer,allolactose.Allolactose acts as an inducer by binding to the repressor protein,which changes the shape of the repressor so that it can no longer bind to the operator.This allows $RNA$ polymerase to transcribe the structural genes,thus lactose (or its isomer allolactose) acts as the inducer for the $lac$ operon.

$(a)\; i$ gene	$(i)\; \beta-\text{galactosidase}$
$(b)\; z$ gene	$(ii)\; \text{Permease}$
$(c)\; a$ gene	$(iii)\; \text{Repressor}$
$(d)\; y$ gene	$(iv)\; \text{Transacetylase}$

Which of the following acts as an inducer for the $lac$ operon in $Escherichia$ $coli$?

Similar Questions

Which enzyme$(s)$ is/are responsible for the transformation of lactose to galactose and glucose in the $E. coli$ culture medium?

Match the following genes of the $Lac$ operon with their respective products.
$(a)\; i$ gene $(i)\; \beta-\text{galactosidase}$
$(b)\; z$ gene $(ii)\; \text{Permease}$
$(c)\; a$ gene $(iii)\; \text{Repressor}$
$(d)\; y$ gene $(iv)\; \text{Transacetylase}$

Select the correct option.

Two scientists were awarded the Nobel Prize in $2006$ for $RNA$ interference. On which organism did these scientists discover this mechanism?

In $lac$ operon,the gene '$i$' codes for repressor protein,the letter '$i$' indicates . . . . . . .

Why can glucose and galactose not act as inducers for the $lac$ operon?

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