NEET Biology question

Biology Molecular Basis of Inheritance NEET

In E. coli, an operator gene combines with

(A)Inducer gene to switch on structural gene action
(B)Inducer gene to switch off structural gene action
(C)Regulator protein (repressor) to switch off structural gene actionCorrect
(D)Regulator protein to switch on structural gene action

Answer: (C)

Solution

The operator is the DNA site to which the repressor protein (produced by the regulator gene) binds; when bound, it blocks

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Question ID VK-120587