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You have a Bacillus subtilis strain that has a negative transcriptional control system on an operon that produces a desired product. It is known that cobalt acts as an inducer. Which of the following best describes this regulatory system? 1) The inducer prevents the repressor from binding to the operator. 2) The inducer binds to the sigma factor, and acts as a transcriptional enhancer. 3) The induceer binds to the operator initiating transcription 4) The inducer causes the repressor to bind to the operator.

Respuesta :

1) The inducer prevents the repressor from binding to the operator, which best describes this regulatory system.

In Bacillus subtilis' negative transcriptional control system.The transcription will be stopped when the repressor binds to the operator. In the event that cobalt is an inducer, the binding of cobalt to the repressor doesn't permit it to bind to the operator. As a result, the gene will be expressed.

The reason for incorrect responses

2. The inducer won't bind to the sigma factor but rather to the repressor.

3. Cobalt cannot directly bind to DNA.

4. Gene expression is typically induced by an inducer.

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