Answer:
The correct answer is B. DNA helicase first unwinds the double helix around the +1 site.
Explanation:
The helicase is an enzyme that specifically breaks the hydrogen bonds of the bases in the transcription process. As E. Coli is a prokaryote, then, the transcription only occurs in one point of the circular DNA. The promoter region indicates where the DNA polymerase has to start replicating and the Topoisomerase unwinds the parts of the DNA that are being excessively twisted because of the separation of the two strands.
The answer is C) The death rate begins to fall, but the birth rates remain high for a time. No countries in the world are currently in Stage 1 or demographic transition. However, many are in stage 2, which is why many governments are concerned about overpopulation.
