Punjab Medical Punjab - MET Solved Paper-2005

  • question_answer The wild type E. coli cells are growing in normal medium with glucose. They are transferred to a medium containing only lactose as sugar. Which of the following changes take place?

    A)  E. coli cells stop dividing

    B)  The lac operon is induced

    C)  The lac operon is repressed

    D)  All operons are induced

    Correct Answer: B

    Solution :

    As per the Operon model of F. Jacob and J. Monod (1961), an E. coli bacterium growing in normal glucose medium, when transferred to a medium containing lactose then lac operon is induced.

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