311C F08 FinalExamPQ-1

311C F08 FinalExamPQ-1 - Final Exam New Material Practice...

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Final Exam : New Material Practice Questions Which of the following statements about the lac operon is not true? a. When lactose binds to the repressor, the repressor can no longer bind to the operator. b. When lactose binds to the operator, transcription is stimulated. c. When the repressor binds to the operator, transcription is inhibited. d. When lactose binds to the repressor, the shape of the repressor is changed. e. When the repressor is mutated, one possibility is that it no longer can bind to the operator. An operon is a. a molecule that can turn genes on and off. b. an inducer bound to a repressor. c. a series of regulatory sequences controlling transcription of protein-coding genes. d. any long sequence of DNA. e. a promoter, an operator, and a group of related structural genes. When tryptophan accumulates in a bacterial cell, a. it binds to the operator, preventing transcription of adjacent genes. b.
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311C F08 FinalExamPQ-1 - Final Exam New Material Practice...

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