AP Biology Quiz
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GENE EXPRESSION AND REGULATION
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In bacteria, gene M is regulated by an inducible system. A repressor binds the operator and prevents transcription when inducer I is absent. When I is present, it binds the repressor and causes the repressor to release the operator, increasing transcription. A mutation changes the repressor so it binds the operator but cannot release it after binding I. Which condition will show the largest decrease in gene M transcription compared with wild type?
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