NEET Biology question

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

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

Answer: (C)

Solution

The inducer (allolactose) binds to the repressor protein, inactivating it so that it can no

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Question ID VK-120809