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Chapter 12: Problem 2

In bacteria, what event marks the end of the initiation stage of transcription?

Short Answer

Expert verified
The initiation stage of transcription in bacteria ends when the RNA polymerase successfully binds to the promoter sequence, the DNA strands separate and the RNA polymerase begins synthesizing the RNA strand.

Step by step solution

01

Understanding transcription initiation in bacteria

Transcription is one of the first steps in gene expression, where the information from a DNA molecule is translated into a messenger RNA (mRNA) molecule. In bacteria, transcription initiation is the first step of this process, and involves the assembly of transcription machinery at the promoter region of the DNA sequence. This machinery includes the RNA polymerase, which synthesizes the mRNA molecule, and various transcription factors that guide the polymerase to the correct location.
02

Ending event of transcription initiation

The initiation stage of transcription ends when the RNA polymerase successfully binds to the promoter sequence and begins synthesizing the mRNA strand. The key event marking the end of transcription initiation in bacteria is therefore the separation of the DNA strands and beginning of RNA synthesis by the RNA polymerase.

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Most popular questions from this chapter

If the following RNA polymerases were missing from a eukaryotic cell, what types of genes would not be transcribed? A. RNA polymerase I C. RNA polymerase III B. RNA polymerase II

In eukaryotes, what types of modifications occur to pre-mRNAs?

Describe the movement of the open complex along the DNA.

After the intron (which is in a lariat configuration) is released during pre- mRNA splicing, a brief moment occurs before the two exons are connected to each other. Which snRNP(s) hold(s) the exons in place so they can be covalently connected to each other?

Discuss the similarities and differences between RNA polymerase (described in this chapter) and DNA polymerase (described in Chapter 11).
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