Multiple Choice
Which step in transcription occurs first?
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15. Gene Expression
Steps of Transcription
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What marks the transition to the elongation stage of transcription in bacteria?
A
The termination of RNA synthesis
B
The binding of RNA polymerase to the promoter
C
The release of the sigma factor
D
The addition of a 5' cap to the RNA
Verified step by step guidance1
Understand the process of transcription in bacteria, which involves the synthesis of RNA from a DNA template.
Recognize the stages of transcription: initiation, elongation, and termination.
During initiation, RNA polymerase binds to the promoter region of the DNA, assisted by the sigma factor, which helps the polymerase recognize the promoter.
The transition to the elongation stage occurs when the sigma factor is released from the RNA polymerase, allowing the polymerase to move along the DNA and synthesize RNA.
Note that the addition of a 5' cap is a modification that occurs in eukaryotic cells, not bacteria, and termination of RNA synthesis marks the end of transcription, not the transition to elongation.
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