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inducible sys. question from kaplan

Discussion in 'DAT Discussions' started by pistolpete007, Jun 19, 2008.

  1. pistolpete007

    pistolpete007 2+ Year Member

    May 18, 2008
    in an inducible gene regulation system:
    A. the inducer binds to repressor to block trnascription.
    B the repressor binds to the operator to block transcription.
    C the inducer binds to the regulator to induce transcription

    the asnwer is B...which i agree with but isnt C right too?
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  3. osimsDDS

    osimsDDS 5+ Year Member

    Jun 8, 2007
    The inducer only binds to the repressor, it can NOT bind to the operator lonesome, therefore it binds to the repressor and induces transcription because the repressor now can not bind to the operator...

    In repressible system the repressor can not bind to the operator, only when the co-repressor binds to the repressor can they both bind to the operator and stop a repressible system transcription is always happeneing...except when their is a repressor co-repressor complex

    hope that helps
  4. pistolpete007

    pistolpete007 2+ Year Member

    May 18, 2008
    ohhh mann....i ACTUALLY knew that i stared at that question for like 5 mins and I KNOW IT BINDS TO REPRESSER but i kept reading regulator as repressor for some reason wow... i need to stop taking practice tests at 4am lol

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