Maximal transcription of the lac operon requires : _____________


a. the presence of high levels of glucose the presence of high levels of glucose

b. the removal of the operator region of the operon the removal of the operator region of the operon

c. the presence of cyclic AMP and lactose the presence of cyclic AMP and lactose the activation of the repressor protein

d. the activation of the repressor protein the presence of cyclin and cyclin-dependent kinase

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