25) Transcription of the lac operon is maximally activated when A) lactose is absent and glucose
is present. B) lactose is absent and glucose is absent. C) lactose is present and glucose is present.
D) lactose is present and glucose is absent.
Solution
The transcription of the lac operon is generally high when theactose is present and Glucose is
absent.
Because when glucose is present bacteria use it as the carbon source, so there won\'t be any
necessary to break down lactose.
So the answer is option D
is present. B) lactose is absent and glucose is absent. C) lactose is present and glucose is present.
D) lactose is present and glucose is absent.
Solution
The transcription of the lac operon is generally high when theactose is present and Glucose is
absent.
Because when glucose is present bacteria use it as the carbon source, so there won\'t be any
necessary to break down lactose.
So the answer is option D
