Video: RNA processing yog dab tsi?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Tag nrho RNAs yog Ameslikas sau los ntawm DNA los ntawm RNA polymerases, uas yog tshwj xeeb enzyme complexes, tab sis feem ntau RNAs yuav tsum tau hloov kho ntxiv los yog ua tiav ua ntej lawv tuaj yeem ua lawv lub luag haujlwm. Yog li, Kev ua haujlwm RNA hais txog tej kev hloov kho rau RNA nruab nrab ntawm nws cov ntawv sau thiab nws qhov kawg ua haujlwm hauv cell.
Tsuas yog li ntawd, ua li cas hauv RNA ua?
Cov RNA strand yog ua tiav kom nws cov introns raug tshem tawm thiab cov exons raug thawb ua ke los ua ib qho txuas ntxiv, luv dua. Qhov no txheej txheem hu ua RNA splicing. RNA splicing yog tshem tawm ntawm introns thiab koom nrog exons hauv eukaryotic mRNA. Nws kuj tshwm sim hauv tRNA thiab rRNA.
Dab tsi yog 3 kauj ruam ntawm kev ua RNA? Peb tseem ceeb tshaj plaws cov kauj ruam ntawm pre-mRNA ua yog qhov sib ntxiv ntawm stabilizing thiab signaling yam ntawm 5' thiab 3 ' xaus ntawm cov molecule, thiab tshem tawm ntawm intervening sequences uas tsis qhia meej cov amino acids tsim nyog. Muaj tsawg zaus, mRNA cov ntawv sau tuaj yeem "kho" tom qab nws tau sau.
Tsis tas li ntawd, lub hom phiaj ntawm kev ua RNA yog dab tsi?
Kev ua haujlwm RNA . RNA pab ib tug ntau ntawm muaj nuj nqi hauv cov hlwb. Cov no muaj nuj nqi Feem ntau koom nrog hauv kev hloov cov ntaub ntawv caj ces muaj nyob rau hauv lub cell DNA rau hauv cov proteins uas txiav txim siab lub cell tus qauv thiab muaj nuj nqi.
Yuav ua li cas rau mRNA tom qab ua tiav?
"Lub neej voj voog" ntawm ib mRNA hauv eukaryotic cell. RNA yog transcribed nyob rau hauv lub nucleus; tom qab ua tiav , nws raug thauj mus rau cytoplasm thiab txhais los ntawm ribosome. Thaum kawg, tus mRNA yog degraded.
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