MCB Exam 2 - RATs (5-9) Questions With Correct Answers
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Course
MCB
Institution
MCB
MCB Exam 2 - RATs (5-9) Questions With
Correct Answers
In euk cells the factors that are involved in the most mRNAs are known as - answergeneral
transcription factors
the first phosphorylation event affecting the CTD of the large subunit of ___ is mediated by a
kinase activity assoc. to ___ - ...
MCB Exam 2 - RATs (5-9) Questions With
Correct Answers
In euk cells the factors that are involved in the most mRNAs are known as - answer✔general
transcription factors
the first phosphorylation event affecting the CTD of the large subunit of ___ is mediated by a
kinase activity assoc. to ___ - answer✔RNA pol II; TFIIH
in euk cells the RNA pol that transcribes messenger RNA is ___ - answer✔RNA pol II
one striking diff at the level in which transcription is initiated btw prok and euk is that -
answer✔in prok all factors required to start transcription are associated to the holo-enzyme,
whereas in euk additional protein factors besides the RNA pol are needed to initiate transcription
the TFII factor that bridges the interaction btw TFIID to the promoter and positioning it in place
to initiate transcription is ___ - answer✔TFIIB
The TFII factor that contains among its subunits two proteins known as XPD and XPB each
endowed with helicase activity is ___ - answer✔TFIIH
the helicase activity that allows transcription by RNA pol II to start is mediated by -
answer✔TFIIH
evolutionarily speaking the existence in euk of three diff polymerases is most likely the result of
- answer✔a selective pressure to ensure high expression of a specific set of genes while allowing
tight control of others
phosphorylation of the CTD is a key regulatory event during transcriptional initiation by RNA
pol I - answer✔False
in euk cells transcription of the genes coding for the large ribosomal RNAs yields a large 45S
pre-rRNA that is later on processed to produce the 18S, 5.8S, and 5S rRNAs - answer✔false
histone deacetylases could be argued to typically ___ gene expression - answer✔decrease
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