1. Which part of the lac operon is cis-dominant?

2.Which proteins facilitate RNA polymerase binding at promoters?

3. Which protein complex directs DNA bending into loops that contact RNA polymerase and transcription factors bound at the core promoter or with protein complexes bound to proximal promoter elements?

4.Which protein complex directs DNA bending into loops that contact RNA polymerase and transcription factors bound at the core promoter or with protein complexes bound to proximal promoter elements?