Video: Dab tsi mus ua ntej transcription lossis txhais lus?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Kev sau ntawv tshwm sim nyob rau hauv lub nucleus. Nws siv DNA ua tus qauv los ua RNA molecule. RNA ces tawm lub nucleus thiab mus mus rau ib tug ribosome nyob rau hauv lub cytoplasm, qhov twg txhais lus tshwm sim. Kev txhais lus nyeem cov kab mob caj ces hauv mRNA thiab ua rau cov protein.
Xav txog qhov no, dab tsi los ua ntej transcription lossis txhais lus?
Cell siv cov noob los tsim cov proteins. Qhov no yog ob kauj ruam txheej txheem. Cov ua ntej kauj yog kev sau ntawv nyob rau hauv uas ib theem zuj zus ntawm ib noob yog replicated nyob rau hauv ib tug RNA molecule. Cov kauj ruam thib ob yog txhais lus nyob rau hauv uas RNA molecule ua hauj lwm raws li ib tug cai rau tsim ib tug amino-acid saw (polypeptide).
Tsis tas li ntawd, qhov twg yog qhov tseeb ntawm cov xwm txheej hauv kev sau ntawv? 1st Initiation, 2nd Elongation, 3rd termination.
Ib yam li ntawd, tib neeg nug, ua li cas koj sau thiab txhais cov DNA ib ntus?
- Kauj ruam 1: DNA transcription. Siv cov hlua ntawm cov DNA uas tau muab ua ntu zus thiab muab tso rau hauv tus xa xov RNA los ntawm kev hloov A nrog U, T nrog A, G nrog C thiab C nrog G. Qhov tshwm sim mRNA yuav tsum tau pub dawb rau DNA.
- Kauj Ruam 2: Kev txhais DNA. tRNA nyeem cov ntaub ntawv caj ces hauv mRNA hauv daim ntawv ntawm codon.
Yuav ua li cas koj transcript DNA ib theem zuj zus?
Nws suav nrog kev luam cov gene DNA sequence los ua ib qho RNA molecule. Kev hloov pauv yog ua los ntawm cov enzymes hu ua RNA polymerases, uas txuas nucleotides los ua ib qho RNA strand (siv cov DNA strand raws li ib tug template). Transcription muaj peb theem: pib, elongation, thiab termination.
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