In prokaryotes, termination of transcription can include which of the following?
a. the formation of a hairpin structure.
b. an enzyme with 5'–3' exonuclease activity.
c. the transcription of a u‑rich region.
d. an enzyme with helicase activity.

In prokaryotes, termination of transcription can include the formation of a hairpin structure.

Option A

Explanation:

During replication the whole genome is being copied while in transcription just a selected portion is transcribed. To a gene to be expressed in its offspring the DNA sequence is copied to the RNA. Sometimes the transcription is terminated because of some terminator DNA.

At once it causes repeated pairing which forms a hairpin like structure. As repetition forms a string of TT this is not tolerated by so the RNA gets separated from the following DNA. This is formed by Rho independent mechanism.

the oxygenated blood then leaves the lungs through pulmonary veins, which return it to the left heart, completing the pulmonary cycle. this blood then enters the left atrium, which pumps it through the mitral valve into the left ventricle. from the left ventricle, the blood passes through the aortic valve to the aorta.

deoxygenated blood leaves through the right ventricle through the pulmonary artery. from the right atrium, the blood is pumped through the tricuspid valve (or right atrioventricular valve), into the right ventricle.

c is the correct answer hope this !