mRNA transcribed from the genes of  ______________ organisms…

mRNA transcribed from the genes of  ______________ organisms allow for coordinated regulation of several proteins at once by controlling initiation of transcription through regulatory regions shared by multiple genes. In contrast, ____________ organisms coordinate regulation of transcription of multiple genes by the action of specific transcription factors.

During regulation of the lac operon, one of the conditions r…

During regulation of the lac operon, one of the conditions required for expression of the operon is the presence of lactose within the bacterial cell. This is because, in the form of allolactose, it interacts with the lac repressor and causes it to shift into an inactive state.  Therefore, allolactose acts as a ____________ during regulation of the lac operon.