Which of the following statements about RNA polymerase is
incorrect? a. It unwinds a short stretch of DNA. b. It synthesizes
RNA from an RNA molecule from start to end. c. It detects
termination signals. d. It interacts with transcription factors. e.
None of the above

Which of the following genetic rearrangements are not promoted
by transpossons? a. Inversions b. rearrangments of host DNA c.
duplications d. deletions e. None of the above

Why does negative supercoiling of circular DNA favor the
transcription of genes? Because it a. increases the efficiency of
all promoters located at distant sites. b. facilitates unwinding.
c. activates RNA polymerase. d. a and b e. e. b and c 36. Why is
the fidelity of transcription much lower than that of replication?
a. RNA polymerase lacks the 5′→ 3′ exonuclease activity b. RNA
polymerase lacks the 3′→ 5′ exonuclease activity c. RNA polymerase
has the 5′→ 3′ exonuclease activity d. a and c e. b and c