In lac- operon, repressor protein binds to

regulator gene

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operator gene

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Promoter gene

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Structural gene

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Solution

The correct option is B operator gene
In lac- operon, repressor protein binds to operator gene.

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\begin{matrix} C o l u m n I & C o l u m n I I p . R e g u l a t o r g e n e & i . B i n d i n g s i t e f o r r e p r e s s o r p r o t e i n q . O p e r a t o r g e n e & i i . C o d e (s) f o r t h e p r o t e i n o f t h e e n z y m e s r . P r o m o t e r g e n e & i i i . C o d e (s) f o r r e p r e s s o r p r o t e i n s . S t r u c t u r a l g e n e s & i v . B i n d i n g S i t e f o r R N A p o l y m e r a s e \end{matrix}

Column-I	Column-II
(A) Structural gene	(i) Binding site for a repressor protein
(B) Operator gene	(ii) Codes for a repressor protein
(C) Promoter gene	(iii) Induce lactose transport from the medium
(D) Regulator gene	(iv) Codes for protein enzyme
	(v) Binding site for RNA polymerase

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