In the absence of this, the repressor protein binds to the operator and blocks the path of RNA polymerase and prevents the expression of structural genes.

Permease

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Regulator

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Promoter

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Inducer

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

Open in App

Solution

The correct option is D Inducer
In the absence of the inducer (Lactose in Lac operon), the repressor protein binds to the operator and blocks the path of RNA polymerase and prevents the expression of structural genes.

Suggest Corrections

Similar questions

\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

Join BYJU'S Learning Program