Put the following events of transcription in chronological o…

Put the following events of transcription in chronological order. Sigma binds to the promoter region. The double helix of DNA is unwound, breaking hydrogen bonds between complementary strands. Sigma binds to RNA polymerase. Sigma is released. Transcription begins.

You have isolated a lac metabolism mutant that contains a mu…

You have isolated a lac metabolism mutant that contains a mutation in the lacI gene.  This mutation alters its inducer binding site such that it cannot recognize lactose.  Which of the following best describes the phenotype you would expect to see in this mutant?