MHT CET Biology question

According to Jacob and Monod (lac operon) model of gene regulation, inducer substances in bacterial cells probably

(A)Combines with the operator regions, activating the associated operons
(B)Combines with the structural genes, stimulating them to synthesize messenger RNA
(C)Combines with the repressor proteins, inactivating the activated lac operonCorrect
(D)Combines with the promoter regions, activating RNA polymerase

Answer: (C)

Solution

The inducer (lactose/allolactose) binds the repressor protein and inactivates it, so the repressor leaves the operator and

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Question ID VK-065676