The Gene That Codes for a Protein Involved in Detoxifying

question 19

Multiple Choice

The gene that codes for a protein involved in detoxifying an environmental toxin is only expressed in the presence of the toxin.A repressor protein controls transcription of the gene.Which of the following is true?

• A) The toxin mediates induction of the gene by relieving repression imposed by the repressor.
• B) The toxin mediates induction of the gene by stimulating activation mediated by an activator.
• C) The toxin mediates repression of the gene by relieving repression imposed by the repressor.
• D) The toxin mediates repression of the gene by stimulating activation mediated by an activator.

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