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List the three RNA polymerases active in eukaryotic nuclei. List the general transcription factors that each...

List the three RNA polymerases active in eukaryotic nuclei. List the general transcription factors that each requires. List the types of genes dependent on each for transcription. ​

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Answer #1

RNA polymerases active in eukaryotic nuclei are:

  • RNA polymerase I
  • RNA polymerase II
  • RNA polymerase III

The types of genes dependent on each for transcription:

  • RNA polymerase I - 5.8S, 18S, 28S rRNA genes
  • RNA polymerase II - mRNA genes
  • RNA polymerase III - tRNA genes and 5S rRNA gene

The general transcription factors required by each RNA polymerase :

  • RNA polymerase I - UBF and SL1
  • RNA polymerase II - TFIID, (TBP) and TBP-associated factors (TAFs),TFIIB(B), TFIIF(F), TFIIE(E) and TFIIH(H)
  • RNA polymerase III - TFIIIA,TFIIIC and TFIIIB
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