what is a transcription factor?

any protein that is required for the initiation of transcription, but is not a part of RNA polymerase

what is the biggest difference between transcribing genes in prokaryotes versus eukaryotes?

in eukaryotes, transcription takes place on a densely proteinized chromatin template

DNA sequence primarily upstream of a gene that is crucial for the initiation of transcription

what is the difference between RNA polymerase I, II, and III?

RNAP I transcribes rRNAs, RNAP II transcribes mRNA and other snRNAs, and RNAP III transcribes tRNA, rRNA, and other snRNAs

what is RNA polymerase I used for and where is it found?

found exclusively in the nucleolus of eukaryotes and is used to transcribe rDNA into rRNA

what is RNA polymerase II used for and where is it found?

it is found in the nucleus of eukaryotes and it transcribes DNA into mRNA as well as other snRNAs

what is RNA polymerase III used for and where is it found?

it is found in the nucleoplasm of eukaryotes and it transcribes short noncoding RNA including tRNA, rRNA, and other snRNAs

where are the promoters for RNA polymerase I, II, and III found?

for RNAP I and II it is found upstream of the start point, where RNAP III is found downstream of the start point

sequence that increases the utilization of eukaryotes promoters and can function in either orientation and in any location (upstream or downstream) relative to the promoters

a short sequence of DNA that can inactivate the expression of a gene in its vicinity

where are enhancers found within the genome?

they can be found upstream, inside, or beyond the end of a gene

how do enhancers work?

they interact with protein bound at the promoter elements, often through intermediates called co-activators

what is a housekeeping gene?

essential, constitutive genes that maintain basic cellular functions

(TATA binding protein) is a component of the positioning factor that is required for each type of RNA polymerase to bind to its promoter. binds directly to TATA box when present, but is required even when not present

what are the different stages of chromatin?

closed chromatin, permissive chromatin, and open chromatin

what is a poised gene?

a potentially active gene in open chromatin

Help

Options

focusNode

Didn't know it?
click below

Knew it?
click below

Don't Know

Remaining cards (0)

Know

retry

shuffle

restart

0:00

Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

Normal Size Small Size show me how

mole. genetics ch.17

eukaryotic transcription

Question	Answer
what is a transcription factor?	any protein that is required for the initiation of transcription, but is not a part of RNA polymerase
what is the biggest difference between transcribing genes in prokaryotes versus eukaryotes?	in eukaryotes, transcription takes place on a densely proteinized chromatin template
what is a promoter?	DNA sequence primarily upstream of a gene that is crucial for the initiation of transcription
what is the difference between RNA polymerase I, II, and III?	RNAP I transcribes rRNAs, RNAP II transcribes mRNA and other snRNAs, and RNAP III transcribes tRNA, rRNA, and other snRNAs
what is RNA polymerase I used for and where is it found?	found exclusively in the nucleolus of eukaryotes and is used to transcribe rDNA into rRNA
what is RNA polymerase II used for and where is it found?	it is found in the nucleus of eukaryotes and it transcribes DNA into mRNA as well as other snRNAs
what is RNA polymerase III used for and where is it found?	it is found in the nucleoplasm of eukaryotes and it transcribes short noncoding RNA including tRNA, rRNA, and other snRNAs
where are the promoters for RNA polymerase I, II, and III found?	for RNAP I and II it is found upstream of the start point, where RNAP III is found downstream of the start point
what is an enhancer?	sequence that increases the utilization of eukaryotes promoters and can function in either orientation and in any location (upstream or downstream) relative to the promoters
what is a silencer?	a short sequence of DNA that can inactivate the expression of a gene in its vicinity
where are enhancers found within the genome?	they can be found upstream, inside, or beyond the end of a gene
how do enhancers work?	they interact with protein bound at the promoter elements, often through intermediates called co-activators
what is a housekeeping gene?	essential, constitutive genes that maintain basic cellular functions
what is TBP?	(TATA binding protein) is a component of the positioning factor that is required for each type of RNA polymerase to bind to its promoter. binds directly to TATA box when present, but is required even when not present
what polymerases use TBP?	all 3 polymerases use TBP
what are the different stages of chromatin?	closed chromatin, permissive chromatin, and open chromatin
what is a poised gene?	a potentially active gene in open chromatin

Created by: angievelasco

"Know" box contains:
Time elapsed:
Retries: