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Eukaryotic RNA Processing and Splicing quiz #2

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  • What name is given to the process in which pre-mRNA is edited into mRNA?
    The process is called RNA splicing.
  • What is the function of a spliceosome?
    A spliceosome removes introns from pre-mRNA and splices together exons to form mature mRNA.
  • What is true of RNA processing?
    It involves adding a 5' cap and poly-A tail
  • Which statement accurately describes the primary transcript of a gene in eukaryotes?
    The primary transcript contains both introns and exons before RNA processing.
  • Which pre-mRNA processing step is important for initiating translation?
    The addition of the 5' cap is important for initiating translation.
  • Which process can produce multiple transcripts from the same gene in eukaryotes?
    Alternative RNA splicing can produce multiple transcripts from the same gene.
  • What does not occur during RNA processing?
    Removal of exons
  • What does alternative splicing help explain?
    The diversity of protein variants
  • Which are the coding sequences that remain in the final mRNA?
    Exons are the coding sequences that remain in the final mRNA.
  • What process correctly describes alternative RNA splicing?
    Different combinations of exons are joined
  • What processing step enhances the stability of pre-tRNAs and pre-rRNAs?
    The addition of a 5' cap and poly-A tail enhances the stability of pre-tRNAs and pre-rRNAs.
  • In which type of organisms does RNA splicing not occur?
    It does not occur in prokaryotes.
  • What is removed during mRNA processing?
    Introns are removed during mRNA processing.
  • What is a characteristic of RNA splicing in eukaryotes?
    RNA splicing involves the removal of introns and joining of exons.
  • During RNA processing, what modifications occur to pre-mRNA?
    During RNA processing, a 5' cap and a poly-A tail are added, and introns are removed.
  • What is the difference between introns and exons?
    Introns are non-coding regions removed during RNA processing, while exons are coding regions that remain in mature mRNA.
  • What is the function of eukaryotic RNA polymerases in gene expression?
    They transcribe genes into pre-mRNA.
  • How may mRNA be modified before it leaves the nucleus?
    mRNA is modified by adding a 5' cap, a poly-A tail, and removing introns.
  • Where in the cell is the pre-mRNA processed into mature mRNA?
    Pre-mRNA is processed into mature mRNA in the nucleus.
  • Where does RNA processing occur in eukaryotic cells?
    It does not occur in the cytoplasm.
  • What does alternative splicing allow in terms of protein production?
    Multiple protein variants from one gene.
  • What does alternative RNA splicing produce by joining different combinations of exons?
    Multiple mRNA variants.
  • Which process occurs only in eukaryotic gene expression and not in prokaryotes?
    RNA splicing.
  • What are the main steps involved in mRNA processing in eukaryotes?
    Adding a 5' cap, a poly-A tail, and removing introns.
  • What is the purpose of alternative splicing in eukaryotic cells?
    Alternative splicing increases protein diversity by allowing different combinations of exons to be joined.
  • What is the role of the 5' cap on a eukaryotic mRNA molecule?
    The 5' cap protects mRNA from degradation and aids in ribosome attachment for translation.
  • What is the biological advantage of alternative splicing?
    Alternative splicing allows for the production of multiple protein variants from a single gene, increasing diversity.
  • Which of these statements correctly describe RNA processing in eukaryotic cells?
    RNA processing involves adding a 5' cap, a poly-A tail, and removing introns to form mature mRNA.
  • Which of these are removed from mRNA during processing in the nucleus?
    Introns are removed from mRNA during processing in the nucleus.
  • What process does not occur during the processing of eukaryotic mRNA?
    Removal of exons
  • What is a characteristic of transcription in eukaryotes that is not found in prokaryotes?
    Eukaryotic transcription results in pre-mRNA that requires processing, including splicing, before translation.
  • In mRNA processing, what modifications are made to pre-mRNA?
    In mRNA processing, a 5' cap and a poly-A tail are added, and introns are removed.
  • What removes the extra information from the newly formed mRNA?
    The spliceosome removes introns from the newly formed mRNA.
  • What process does not occur before a eukaryotic mRNA is exported from the nucleus?
    Removal of exons
  • What are coding regions of eukaryotic mRNA that are translated?
    Exons are the coding regions of eukaryotic mRNA that are translated.
  • Which region(s) of a gene are not found within the mRNA transcript?
    Introns are not found within the mature mRNA transcript.
  • What does a primary RNA transcript contain?
    A primary RNA transcript contains both introns and exons.
  • Which process would be most directly affected if the 5' cap is not added to an mRNA?
    Translation initiation would be most directly affected.
  • How is the 3' end of a eukaryotic mRNA modified?
    The 3' end of a eukaryotic mRNA is modified by the addition of a poly-A tail.
  • What does RNA processing involve in eukaryotic cells?
    It adds a 5' cap and poly-A tail