Becker's World of the Cell 9th Edition by Lewis Kleinsmith, Jeff Hardin, Gregory Paul Bertoni

Exercise 6

RNA Polymerases and Promoters. For each of the following statements about RNA polymerases, indicate with a B if the statement is true of the bacterial enzyme and with a I, II, or III if it is true of the respective eukaryotic RNA polymerase. A given statement may be true of any, all, or none (N)of these enzymes.
(a)The enzyme is insensitive to a-amanitin.
(b)The enzyme catalyzes an exergonic reaction.
(c)All the primary transcripts must be processed before being used in translation.
(d)The enzyme may sometimes be found attached to an RNA molecule that also has ribosomes bound to it.
(e)The enzyme synthesizes rRNA.
(f)Transcription factors must bind to the promoter before the polymerase can bind.
(g)The enzyme adds a poly(A)sequence to mRNA.
(h)The enzyme moves along the DNA template strand in the 3 - 5' direction.
(i)The enzyme synthesizes a product likely to acquire a 5 cap.
(j)All promoters used by the enzyme lie mostly upstream of the transcriptional startpoint and are only partially transcribed.
(k)The specificity of transcription by the enzyme is determined by a subunit of the holoenzyme.