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Repressors....

Repressors.

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Repressors are protiens which are able to bind the operator region of the operon and prevent the RNA polymerase from transcribing the operon.
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Lac operan exerts negative control when (1). Repressor binds promoter gene. (2) Repressor binds operator gene. (3). Inducer binds repressor. (4) Repressor binds with structural gene.

Repressor protein is produced by :

Repressor of lac-operon

Repressor of operon model binds itself to

Assertion :- Lac opertor is present only in lac operon & it interact specifically with lac repressor only. Reason : Each operon has its specific operator & specific repressor.

Match the following genes of the Lac operon with their respective products {:((a),"i gene",(i),beta-"galactosidase"),((b),"z gene",(ii),"Permease"),((c),"a gene",(iii),"Repressor"),((d),"y gene",(iv),"Transacetylase"):} Select the correct option.

Which of the following statements are correct ? I. The structural gene is the segment of DNA, which exercises a central over transcription II. The regulator gene is responsible for the synthesis of repressor. IIIgt The operator gene is the segment of DNA, which carries code for the synthesis of protein IV.The promoter gene is the DNA segment at which RNA polymerase binds

Regulation of lac operon by repressor is called

In Lac-operon, repressor protein binds to