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Steps of Transcription quiz

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  • What are the three main steps of transcription?
    The three main steps are initiation, elongation, and termination.
  • During initiation, what does RNA polymerase bind to on the DNA?
    RNA polymerase binds to the promoter region on the DNA.
  • How does RNA polymerase binding to the promoter differ between prokaryotes and eukaryotes?
    In prokaryotes, RNA polymerase binds directly to the promoter, while in eukaryotes, transcription factors are required for binding.
  • What happens to the DNA strands during the initiation of transcription?
    The two DNA strands are separated, exposing the template strand for RNA synthesis.
  • What is the main function of RNA polymerase during elongation?
    RNA polymerase synthesizes RNA by base pairing free RNA nucleotides with the DNA template strand.
  • In which direction does RNA polymerase synthesize the new RNA strand?
    RNA polymerase synthesizes RNA in the 5' to 3' direction.
  • What is the initial RNA product called in eukaryotes after transcription?
    It is called a premature RNA or pre-mRNA.
  • What must happen to pre-mRNA in eukaryotes before it can be translated?
    Pre-mRNA must undergo further processing to become a functional RNA molecule.
  • What signals the termination of transcription?
    A terminator sequence on the DNA signals the termination of transcription.
  • What happens to RNA polymerase and the RNA molecule during termination?
    RNA polymerase and the newly synthesized RNA molecule are released from the DNA.
  • Is the RNA produced in prokaryotes immediately ready for translation?
    Yes, in prokaryotes, the RNA is ready for translation immediately after transcription.
  • Can multiple RNA polymerases transcribe the same gene at the same time?
    Yes, several RNA polymerases can transcribe the same gene simultaneously to produce more RNA.
  • What is the role of transcription factors in eukaryotic transcription initiation?
    Transcription factors help recruit RNA polymerase to the promoter region in eukaryotes.
  • What is the difference between the final RNA product in prokaryotes and eukaryotes after transcription?
    In prokaryotes, the RNA is final and ready for translation, while in eukaryotes, the RNA is a pre-mRNA that requires processing.
  • What does the process of elongation accomplish during transcription?
    Elongation builds and lengthens the RNA molecule by adding RNA nucleotides complementary to the DNA template.