With regard to the lac operon, which of the following is false under conditions of low (or no) glucose? Selected Answer: RNA polymerase can bind to the promoter Answers: Lactose anabolism will occur The repressor is not bound to the operator Allolactose is bound to the repressor RNA polymerase can bind to the promoter
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Step 1: In conditions of low (or no) glucose, the lac operon is activated because the repressor is not bound to the operator, allowing for transcription to occur. Show more…
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Which of the following statements about the lactose operon in E. coli is FALSE? Choose an answer below: It contains the genes that encode the proteins for lactose metabolism. Its transcription is induced when allolactose binds to the lac repressor. It contains a promoter and an operator. It is strongly transcribed when lactose is present in the medium and glucose is absent. none of the above
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Which of the following of the Lac operon is true? A) The Lac repressor binds to the operator when lactose is present in the cell. B) The CAP activator dissociates from DNA when it is bound to cAMP. C) The CAP activator will not recruit RNA polymerase to the Lac promoter if lactose is absent. D) If lactose is absent, the Lac operon will be transcribed.
For the $E$. coli lac operon, when lactose is present: a. and glucose is absent, cAMP binds and activates catabolic activator protein (CAP). b. and glucose is absent, the level of cAMP decreases. c. activated CAP binds the repressor protein to remove it from the operator gene. d. the cell prefers lactose over glucose. e. RNA polymerase cannot bind to the promoter.
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