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Questions and Answers
Which strand of DNA has the same sequence as the mRNA in prokaryotes?
Which strand of DNA has the same sequence as the mRNA in prokaryotes?
- Neither strand has the same sequence
- Both strands have the same sequence
- Coding (nontemplate) strand (correct)
- Template strand
What is the direction of transcription in prokaryotes?
What is the direction of transcription in prokaryotes?
- Both directions
- 3' to 5'
- Neither direction
- 5' to 3' (correct)
What is the role of sigma factors in transcription in prokaryotes?
What is the role of sigma factors in transcription in prokaryotes?
- Terminating transcription
- Elongating the RNA strand
- Initiating transcription
- Recognizing specific sequences within promoters (correct)
Which type of RNA polymerase is responsible for transcription in eukaryotes?
Which type of RNA polymerase is responsible for transcription in eukaryotes?
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What is the role of enhancers in transcription initiation?
What is the role of enhancers in transcription initiation?
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Study Notes
Transcription in Prokaryotes
- The sense strand of DNA has the same sequence as the mRNA in prokaryotes.
- Transcription occurs in the 5' to 3' direction in prokaryotes.
- Sigma factors play a crucial role in transcription initiation by recognizing specific DNA sequences and recruiting RNA polymerase to the transcription start site.
Transcription in Eukaryotes
- RNA polymerase II is responsible for transcription in eukaryotes.
Transcription Initiation
- Enhancers play a key role in transcription initiation by looping back to the promoter region, allowing transcription factors to bind and recruit RNA polymerase, thereby stimulating transcription.
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Description
Test your knowledge on the distinct phases of the transcription process in prokaryotes, the structure of bacterial RNA polymerase and the role of sigma factors in recognizing specific sequences.
