Question

Which of the following statements is TRUE regarding the promoter sequence of a bacterial gene?

a. Bacterial promoter sequence contain a consensus sequence at -10.
b. Bacterial promoter sequence have a consensus sequence at -35.
c. The promoter sequence is where RNA polymerase first binds.
d. A and B
e. all of the above

Answer 1

E. All of above

Step-by-step explanation:

Promoters are the sequences present upstream of a gene where RNA polymerase binds first to start the process of transcription. Bacterial promoters are located between -70 and +30 regions.

Among the most common bacterial promoters that are recognized by RNA polymerase holoenzyme are the two short consensus sequences. These consensus sequences are present at the positions -10 and -35. The consensus sequence at -10 position is (5’)TATAAT(3’). On the other hand, the consensus sequence at the -35 region is (5’)TTGACA(3’).