Which of the following steps happens first during transcription?

Question

Which of the following steps happens first during transcription? a. rna polymerase reaches the end of the gene. b. rna polymerase reaches the beginning of a gene. c. rna polymerase pulls apart the double helix. d. rna polymerase produces mrna from dna.

Prof. Aniya Fahey · Accepted Answer

The first step in gene expression would be the transcription of RNA. What happens here is that a part of the DNA is being replicated into the RNA through an enzyme. Therefore, what happens first during transcription is that, the RNA polymerase reaches the start of a gene. The answer would be B.

Prof. Aniya Fahey · Answer

The correct answer is - B. RNA polymerase reaches the beginning of a gene. Explanation:Transcription is a phenomenon of synthesis of mRNA (messenger RNA) using a template DNA, which takes place with the help of enzyme RNA polymerase. This enzyme reaches the site from where the gene begins and thus follows its transcription using a DNA template. It adds nucleotides in the direction 5' to 3' that is complementary to the DNA template.Therefore, to begin the process, enzyme RNA polymerase reaches the start site of gene. Thus, option B) is the right answer.

Prof. Aniya Fahey · Answer

B. RNA polymerase reaches the beginning of a gene

Zetta Hackett

Which of the following steps happens first during transcription?

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