1. -Means that the mRNA carries info for the production of multiple proteins
    -Is this a prokaryotic or eukaryotic trait?
    • -Polycistronic
    • -Prokaryotic
  2. Sequences on the 5' end of prokaryotic mRNA that are never translated into a protein
    5' UTR, or leader sequences
  3. Sequences on the 3' end of prokaryotic mRNA that are never translated into a protein
    3' UTR, or trailer sequences
  4. Eukaryotic mRNA is ____; that is, it carries information for the production of a single polypeptide
  5. large precursors of eukaryotic mRNA
    heterogeneous nuclear RNA / hnRNA
  6. Structure of the eukaryotic 5' cap: the 5' ends of eukaryotic mRNA have this group attached via a 5' to 5' triphosphate linkage.
  7. Components of the large, 50S ribosomal unit in prokaryotic rRNA
    • -23S rRNA
    • -5S rRNA
  8. Component of the small, 30S ribosomal subunit in prokaryotic rRNA
    16S rRNA
  9. How many kinds of rRNA do eukaryotes have?
  10. Components of the large, 60S ribosomal subunit in eukaryotic rRNA
    • -28S
    • -5.8S
    • -5S
  11. Component of the small, 40S ribosomal subunit in eukaryotic rRNA
  12. Which eukaryotic rRNA component is the transcription product of a separate gene?
  13. True/False: tRNAs are not modified post-transcriptionally.
    False: tRNAs are heavily modified post-transcriptionally.
  14. An RNA component of signal recognition particles
    small cytoplasmic RNAs (scRNAs)
  15. RNA that is associated with snurps, which function in the splicing reactions needed to process hnRNA to mRNA
    small nuclear RNAs (snRNAs)
  16. RNAs that silence genes by promoting the cleavage mRNAs with exactly complementary sequences
    short interfering RNAs (siRNAs)
  17. RNAs that silence certain cellular genes at the stage of protein synthesis
    micro RNAs (miRNAs)
  18. 3 phases of transcription
    initian, elongation, termination
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