16. Regulation of Expression
The Lac Operon
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- Multiple Choice
The protein that binds to the operator of the lac operon to prevent transcription is encoded by which gene?
1901views5rank1comments - Multiple Choice
The lac operon is a(n) _______________ operon that is typically ______________.
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In the lac operon, which of the following functions does the lactose molecule serve:
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If E. coli bacteria are grown in the presence of lactose:
3157views10rank - Textbook QuestionWhy are the genes involved in lactose metabolism considered to be an operon? a. They occupy adjacent locations on the E. coli chromosome. b. They have a similar function. c. They are all required for normal cell function. d. They are all controlled by the same promoter.762views
- Textbook Question
Why are the genes involved in lactose metabolism considered to be an operon? a. They occupy adjacent locations on the E. coli chromosome. b. They have a similar function. c. They are all required for normal cell function. d. They are all controlled by the same promoter.
510views - Textbook QuestionEvaluate these statements about regulation of the lac operon. Select True or False for each statement. T/F The lac operon is transcribed at the highest rate when extracellular glucose and lactose are abundant. T/F The repressor protein is bound to DNA of the operator when lactose is present. T/F A mutation in the operator is likely to prevent transcription of the lac operon under any condition. T/F A mutation that alters the catabolite activator protein is predicted to alter the regulation of many different operons.839views
- Textbook Question
Evaluate these statements about regulation of the lac operon. Select True or False for each statement. T/F The lac operon is transcribed at the highest rate when extracellular glucose and lactose are abundant. T/F The repressor protein is bound to DNA of the operator when lactose is present. T/F A mutation in the operator is likely to prevent transcription of the lac operon under any condition. T/F A mutation that alters the catabolite activator protein is predicted to alter the regulation of many different operons.
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