Puas yog DNA ncaj qha koom nrog hauv kev sau ntawv?
Puas yog DNA ncaj qha koom nrog hauv kev sau ntawv?

Video: Puas yog DNA ncaj qha koom nrog hauv kev sau ntawv?

Video: Puas yog DNA ncaj qha koom nrog hauv kev sau ntawv?
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Kev sau ntawv yog tus txheej txheem uas DNA yog theej ( luam tawm ) mus rau mRNA, uas nqa cov ntaub ntawv xav tau rau kev tsim cov protein. Kev sau ntawv yuav tshwm sim nyob rau hauv ob kauj ruam dav. Ua ntej, ua ntej tus tub txib RNA yog tsim, nrog rau kev koom tes ntawm RNA polymerase enzymes.

Tsis tas li ntawd, dab tsi yog lub luag haujlwm ntawm DNA hauv kev sau ntawv?

Kev sau ntawv yog txheej txheem ntawm kev ua RNA strand los ntawm a DNA template, thiab RNA molecule uas tau tsim yog hu ua transcript. Neeg xa xov liaison RNA (mRNA), uas nqa cov ntaub ntawv caj ces los ntawm DNA thiab yog siv los ua tus qauv rau kev tsim cov protein.

Ib tug kuj yuav nug, dab tsi yog DNA transcription txheej txheem? kev sau ntawv / DNA transcription . Kev sau ntawv yog cov txheej txheem los ntawm uas cov ntaub ntawv nyob rau hauv ib tug strand ntawm DNA yog theej rau hauv ib lub molecule tshiab ntawm tus tub txib RNA (mRNA). Kev sau ntawv yog ua los ntawm ib tug enzyme hu ua RNA polymerase thiab ib tug xov tooj ntawm accessory proteins hu ua kev sau ntawv yam.

Raws li txoj cai, DNA ncaj qha cuam tshuam nrog kev txhais lus?

Hauv DNA code, "lo lus" yog ib txwm 3 tsab ntawv ntev thiab nws qhia ib qho ntawm 20 amino acids. Txawm li cas los xij, DNA tsis yog koom ncaj qha hauv txhais lus txheej txheem, es tsis txhob mRNA yog transcribed mus rau ib theem ntawm cov amino acids.

DNA transcription tshwm sim qhov twg?

Kev sau ntawv tshwm sim nyob rau hauv lub nucleus. Nws siv DNA raws li ib tug template los ua ib tug RNA molecule. RNA tom qab ntawd tawm hauv lub nucleus thiab mus rau ib qho ribosome hauv cytoplasm, qhov chaw txhais lus tshwm sim . Kev txhais lus nyeem cov noob caj noob ces hauv mRNA thiab ua rau cov protein.

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