The lac operon can be regulated by two distinct methods. which of the following statements are correct? the lac operon can be activated by the binding of allolactose to the repressor protein, releasing it from dna and thereby allowing for transcription to occur. when glucose levels are low, the allosteric activator of the repressor protein dissociates, causing the repressor to release dna and thereby allowing for transcription to occur. in response to low glucose levels, camp is upregulated; the binding of camp to the camp receptor protein triggers the activation of the operon. camp levels increase in response to low glucose levels and this secondary messenger allosterically binds to the repressor protein, causing it to release from dna.