The operator portion of the lac operon controls RNA polymerase's access to lactose-metabolizing genes. true false

True!

The lac operon is responsible for transport and metabolism of lactose in enteric bacteria. It consists of structural genes, promoter, operator, regulator, and terminator. The operator is a segment of DNA to which some repressor proteins bind. These proteins prevent RNA polymerase from binding to genes and transcribing them. Thus, the operator controls RNA polymerase's access to lactose-metabolizing genes.