NEET Biology question

Assuming that the level of glucose is low, a mutation occurred in the repressor of the lac operon in E. coli, preventing the binding of the repressor to the operator. It will results in

(A)Constitutive expression of the lac operon genesCorrect
(B)Lack of expression or reduced expression of the lac operon genes under all circumstances
(C)Expression of the genes only when lactose is present
(D)Expression of the genes only when lactose is absent

Answer: (A)

Solution

With the repressor unable to bind the operator, RNA polymerase can transcribe the lac operon

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Question ID VK-120776