Genetics Lecture Final

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Genetics Lecture Final
2012-05-07 02:12:25

genetics final
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  1. aminoacyl tRNA synthetase
    charges a tRNA with its appropriate amino acid
  2. RNA polymerase I
    transcribes rDNA to produce the 45S rRNA precursor
  3. RNA polymerase II
    transcribes protein encoding genes
  4. RNA polymerase III
    transcribes tRNA, 5S rRNA, and some snRNA genes
  5. sigma subunit
    simultaneously binds to the sequences TTGACA and TATAAT
  6. TFIID
    Complex of proteins that recognizes the sequence TATAA in eukaryotes
    basal transcription factor required for transcription of tRNA
  8. SL1
    basal transcription factor for RNA Pol I
  9. TBP
    this protein is required for transcription initiation by all 3 eukaryotic RNA polymerases
  10. rho protein
    binds to prokaryotic mRNAs to cause transcription termination
  11. peptidyl transferase
    the ribozyme activity of the large subunit of the rRNAs
  12. release factor
    recognizes the sequence UAA
  13. EF-1a (EF-Tu)
    causes aminoacylated tRNAs to bind to the ribosome
  14. EF-2 (EF-G)
    factor responsible for translocation of the ribosome
  15. eIF-2 (IF-2)
    factor that assembles tRNAi, with the small ribosomal subunit-mRNA complex
  16. eIF-4
    factor that recognizes the cap of eukaryotic mRNAs
  17. eIF-5
    helps to dissociate the other elongation factors, which allows the large ribosomal subunit to bind
  18. U1 snRNP
    is the 1st molecules to base pairs at the 5 splice sites of introns of eukaryotic pre-mRNAs
  19. U2 snRNP
    binds to the branch point in introns of eukaryotic pre-mRNAs
  20. U5 snRNP
    base pairs at the 3 splice sites of introns of eukaryotic pre-mRNAs
  21. Guanylyl transferase
    this enzyme modifies the 5 end of the mRNAs
  22. polyA polymerase
    this enzyme modifies the 3 end of mRNAs