Test: GRE Subject Test: Biochemistry, Cell, and Molecular Biology

1.

In regards to the lac operon in the presence of lactose, will the genes be transcribed in large amounts?

Yes; the lactose sugars remove the repressor and the genes will be transcribed rigorously 

Yes; the lactose sugars bind transcription factors that turn on transcription

No; the lac operon does not utilize lactose sugars in its regulatory mechanism

Maybe; it depends on the concentration of glucose

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