Q. In a mero-diploid you have one I- and one I+ Repressor gene in the two lac operons. I+ is wild type while I- is a mutant which produces a repressor that doesn’t bind. What would be the functionality of the diploid?

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Q. Which of these Lac operon mero- diploid will be constitutively turned on? Considering the terms has their usual meaning.

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Q. Which of these combinations will result is am operon that can never produce beta galactosidse?

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Q. Which of the Ars operon regulation site is actually preventing RNA polymerase from binding and producing the Ara genes BAD?

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Q. Which of these Ara genes is a mode of feedback autoregulation?

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Q. In which of this condition is Ara operon functional?

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Q. Which of the Ara promoter regulation is controlled by binding of repressors on the O1 regulating unit?

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Q. Which of these operons is anabolic?

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Q. Which of these systems give the best mode for turning trp operon off?

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Q. A Lac repressor is a tetramer repressed when bound to the inducer. The trp repressor is a ____________________

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Q. Which of these properties do not agree with trp operon attenuator?

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Q. Which segments of the attenuator together form the repression loop?

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Q. We know that lactose has a positive impact on the activity of the lac operon. Tryptophan’s presence has a ________________

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Q. If in an experiment you mutate the two trp codons in the attenuator to ala codon what will be the impact on repression?

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Q. Which of these items have a positive impact on PEDCBA transcription?

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Q. When uncharged tRNA concentration is low what will you expect as the activity of tryptophan operon?

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Q. How many stem loop structures play important role in complete system of tryptophan gene regulation?

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Q. Which of this mode of trp regulation is not possible in eukaryotes?

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Q. In which microorganism will you find attenuation by alternate loop formation due to ribosomal stalling?

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Q. Which operon behaves similar to Bacillus subtilis trp operon in terms of attenuation?

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