Answer these three questions as soon as : ) 20 * how is lac operon regulated? * describe how most eukaryotic genes are controlled. * how is gene regulation in prokaryotes and eukaryotes similar? how is it different?

The first question...
lac operon is regulated by a specific protein called lactose.
the second question
the eukaryotic genes are controlled by the lactose proteins binding to the regulatory sites through the regulatory surface.
the third question
DIFFERENCE:prokaryotes regulation occurs in the cytoplasm while eukaryotes regulation occurs in the nucleus..
SIMILARITY:The transcription level of prokaryotes occurs in the cytoplasm and also the protein transcription level of the eukaryotes occurs in the cytoplasm