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NEET AIPMT SOLVED PAPER SCREENING 2010

  • question_answer
    Select the two statements out of the four (1-4) given below about (ac operon. (1) Glucose or galactose may bind with the represser and inactivate it (2) In the absence of lactose, the represser binds with the operator region (3) The z-gene codes for permease (4) This was elucidated by Francois Jacob and Jacques Monod The correct statements are

    A) (2) and (3)     

    B)        (2) and (3)          

    C)        (2) and (4)     

    D)        (1) and (2)

    Correct Answer: C

    Solution :

    In prokaryotes, a hypothesis was given in 1961 to explain the protein synthesis regulation. This hypothesis was given by P Jacob and J Monod and for this awarded Nobel Prize in 1965, the hypothesis was known by the name of Operon Model. The operator gene is the segment of DNA, which exercise a control over transcriptions. In the absence of lactose, the represser binds with the operator gene.


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