When the lac repressor is bound to allolactose it shifts to…

When the lac repressor is bound to allolactose it shifts to an inactive state. This interaction allows the operon to be transcribed when lactose is present. Therefore the lac operon is said to be under __________ regulation due to the action of the lac repressor. 

An RNA polymerase can synthesize RNA in either direction rel…

An RNA polymerase can synthesize RNA in either direction relative to the DNA template. This means that, for a given gene, both strands of the double-stranded DNA could function as the template and one will be selected at random during initiation of transcription.