RNA polymerases and processing

Question 1

which RNA polymerase starts randomly on native and foreign DNA?

Answer 1

the core enzyme

Question 2

which RNA polymerase starts randomly on foreign DNA but specifically on native DNA?

Answer 2

the holoenzyme

Question 3

what does the beta-beta sub unit do?

Answer 3

responsible for high processivity of the enzyme

Question 4

what does the alpha sub unit do?

Answer 4

responsible for non specific DNA binding

Question 5

what does the omega sub unit do?

Answer 5

binds to sigma, responsible for enzyme assembly

Question 6

what does the sigma factor do?

Answer 6

promoter recognition