Qhov Tseem Ceeb Qhov txawv - RNA Polymerase I vs II vs III
RNA polymerase yog ib qho tseem ceeb enzyme pom nyob rau hauv tag nrho cov kab mob thiab ntau yam kab mob. Nws yog enzyme lub luag haujlwm rau kev sib txuas RNA molecule los ntawm DNA template thaum lub sij hawm tus txheej txheem hu ua transcription. Cov ntaub ntawv caj ces khaws cia hauv DNA ntu yog hloov mus rau mRNA ntu, thiab cov tshuaj tiv thaiv no yog catalyzed los ntawm RNA polymerase enzyme. Nws yog ib tug complex protein molecule muaj li ntawm txawv subunits. Prokaryotes muaj ib hom RNA polymerase (Prokaryotic RNA Polymerase). Eukaryotes muaj ntau hom RNA polymerases (Eukaryotic RNA Polymerase). Lawv yog RNA Polymerase I, II, III, IV thiab V. Ntawm lawv RNA polymerase I, II thiab III yog hom tseem ceeb. Txhua hom yog lub luag haujlwm rau kev sib txuas ntawm ib qho sib txawv ntawm RNA. RNA polymerase I catalyze lub transcription ntawm DNA uas ua rau rRNA ntawm lub subunit loj ntawm ribosome. RNA polymerase II yog hom RNA polymerase uas sau cov txheej txheem ntawm DNA, uas ua rau mRNA. RNA polymerase III sau cov DNA uas ua rau rRNA ntawm lub subunit me me ntawm ribosome thiab tRNA. Qhov no yog qhov sib txawv tseem ceeb ntawm RNA polymerase I, II, thiab III.
RNA Polymerase Kuv yog dab tsi?
RNA polymerase I yog ib hom RNA polymerase enzyme pom nyob rau hauv siab dua eukaryotes. Nws catalyzes cov transcription ntawm rRNA molecules. Molecular loj ntawm RNA pol I yog 590 kDa. Nws yog tsim los ntawm 14 txawv polypeptides (subunits).
Daim duab 01: RNA polymerase I
RNA polymerase kuv tsis yog nyob ntawm TATA lub thawv hauv cheeb tsam txhawb nqa. Nws yuav tsum muaj kev tswj hwm cov dej ntws tawm uas nyob nruab nrab ntawm -200 thiab -107 thiab cov ntsiab lus tseem ceeb hauv thaj av ntawm -45 thiab +20.
RNA Polymerase II yog dab tsi?
RNA polymerase II yog ib hom eukaryotic RNA polymerase enzyme. Nws catalyzes cov transcript ntawm DNA uas codes rau lub synthesis ntawm lub precursors ntawm mRNA thiab feem ntau ntawm snRNA thiab microRNA.
Daim duab 02: RNA Polymerase II
RNA polymerase II yog tsim los ntawm 12 protein subunits, thiab nws yog 500 kDa loj. Nws yog qhov kev kawm dav tshaj plaws RNA polymerase enzyme hom kom deb li deb.
RNA Polymerase III yog dab tsi?
RNA polymerase III yog ib hom eukaryotic RNA polymerase enzyme uas yog lub luag haujlwm rau kev hloov pauv ntawm ribosomal 5S rRNA, tRNA thiab lwm yam RNAs me. Qhov no yog lub enzyme uas catalyzes cov transcription ntawm tag nrho cov tsev tu noob uas yuav tsum tau nyob rau hauv tag nrho cov cell hom thiab nyob rau hauv feem ntau ib puag ncig tej yam kev mob. Qhov loj ntawm RNA polymerase nyob nruab nrab ntawm 500 - 700 kDa. Nws yog hom loj tshaj plaws ntawm eukaryotic RNA polymerase.
Dab tsi yog qhov zoo sib xws ntawm RNA Polymerase I II thiab III?
- RNA polymerase I, II thiab III yog peb hom eukaryotic RNA polymerases.
- Txhua cov enzymes yog complex, ntau subunit proteins.
- Txhua cov enzymes yog lub luag haujlwm rau kev sau.
- Txhua cov enzymes xav tau DNA qauv los tsim RNA.
- Txhua cov enzymes xav tau cov khoom siv protein ntxiv rau kev khi thiab pib ntawm kev hloov pauv.
Qhov txawv ntawm RNA Polymerase I II thiab III yog dab tsi?
RNA Polymerase I vs RNA Polymerase II vs RNA Polymerase III |
|
| RNA polymerase I | RNA polymerase kuv yog hom RNA polymerase uas ua ke cov subunit loj ntawm rRNA. |
| RNA polymerase II | RNA polymerase II yog hom RNA polymerase uas ua ke mRNA thiab snRNA thiab microRNA. |
| RNA polymerase III | RNA polymerase III yog hom RNA polymerase uas catalyzes cov synthesis ntawm tRNA thiab cov subunit me me ntawm rRNA. |
| Sub Units | |
| RNA polymerase I | RNA polymerase Kuv muaj 14 subunits. |
| RNA polymerase II | RNA polymerase II muaj 12 subunits. |
| RNA polymerase III | RNA polymerase III muaj 17 subunits. |
| RNA polymerase I | Loj ntawm RNA polymerase Kuv yog 590 kDa. |
| RNA polymerase II | Loj ntawm RNA polymerase II yog 500 kDa. |
| RNA polymerase III | RNA polymerase III yog 700 kDa. |
Summary – RNA Polymerase I vs II vs III
RNA polymerase yog cov enzyme uas catalyzes cov txheej txheem transcription. Nws synthesizes RNA molecules los ntawm DNA qauv. Li no, nws tseem hu ua DNA nyob ntawm RNA polymerase. Muaj peb yam tseem ceeb ntawm RNA polymerases hauv eukaryotes uas yog RNA polymerase I, II thiab III. RNA polymerase I yog lub luag haujlwm rau kev sib txuas ntawm cov subunit loj ntawm ribosomal RNA. RNA polymerase II catalyzes cov synthesis ntawm precursors ntawm mRNA molecules thiab lwm yam snRNA thiab microRNA. RNA polymerase III yog cov enzyme uas sau cov DNA uas ua rau lub subunit me me ntawm rRNA thiab tRNA. Qhov no yog qhov txawv ntawm RNA polymerase I, II thiab III.
Download the PDF of RNA Polymerase I vs II vs III
Koj tuaj yeem rub tawm PDF version ntawm kab lus no thiab siv nws rau offline hom phiaj raws li daim ntawv ceeb toom. Thov rub tawm PDF version ntawm no: Qhov txawv ntawm RNA Polymerase I II thiab III
