A researcher has cloned a bacteriophage (phage) gene P into a bacterial vector under the control of a phage promoter. To express this gene in bacteria, a particular strain of bacteria that carries a phage RNA polymerase is used. The phage RNA polymerase expression in turn can be induced by addition of an inducer to the medium. Rifampicin specifically inhibits bacterial RNA polymerase and not phage RNA polymerase. Chl