Which of the Following Is True of the Lac Operon

question 65

Multiple Choice

Which of the following is true of the lac operon?

• A) it is negatively controlled via the lac repressor, a protein that only binds to DNA in the absence of lactose
• B) it is positively controlled via CAP, a protein that is activated by binding to ATP
• C) lactose represses the lac operon but this repression can be removed by addition of IPTG
• D) binding of lactose (or an analog of lactose) increases the affinity of the lac repressor for DNA
• E) none of the above

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