Cov txheej txheem:
Video: Thawj kauj ruam hauv kev sau ntawv yog dab tsi?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Cov thawj kauj ruam ntawm kev sau ntawv yog hu ua pre-initiation. RNA polymerase thiab cofactors (general kev sau ntawv yam) khi rau DNA thiab unwind nws, tsim ib qho pib npuas. Qhov chaw no muab RNA polymerase nkag mus rau asingle strand ntawm DNA molecule.
Qhov sib thooj, dab tsi yog cov kauj ruam rau kev sau ntawv?
Transcription muaj plaub theem:
- Kev pib. Lub DNA molecule unwinds thiab sib cais los tsim asmall qhib complex.
- Elongation. RNA polymerase txav raws tus qauv strand, ua ke ntawm mRNA molecule.
- Kev txiav txim. Hauv prokaryotes muaj ob txoj hauv kev uas tau txiav tawm.
- Kev ua haujlwm.
Tsis tas li ntawd, cov kauj ruam rau kev txhais lus yog dab tsi? Kev txhais lus ntawm ib qho mRNA molecule los ntawm ribosomeoccurs hauv peb theem : pib, elongation, andtermination. Thaum pib, qhov me me ribosomal subunit khi rau qhov pib ntawm mRNA ib ntus.
Nyob rau hauv no txoj kev, dab tsi yog yuav tsum tau rau transcription?
Txheej txheem cej luam ntawm kev sau ntawv Lub hom phiaj ntawm kev sau ntawv yog ua ib daim ntawv theej ntawm RNA cov noob caj noob ces DNA. Rau cov protein-coding noob, RNA luam, lossis cov ntawv sau, nqa cov ntaub ntawv xav tau tsim apolypeptide (protein lossis protein subunit).
Yuav ua li cas thaum transcription?
Nws siv DNA ua tus qauv los ua RNA molecule. RNAthen tawm ntawm lub nucleus thiab mus rau ribosome nyob rau hauv lub cytoplasm, qhov twg txhais tshwm sim . Nws yog kev hloov cov tshuaj geneticinstructions hauv DNA mus rau tus tub txib RNA (mRNA). Thaum sau ntawv , ib strand ntawm mRNA yog tsim uas yog complementaryto ib strand ntawm DNA.
Pom zoo:
Thawj kauj ruam ntawm kev ua pa ntawm tes yog dab tsi thiab nws tshwm sim qhov twg?
Glycolysis
Plaub kauj ruam ntawm kev sau ntawv yog dab tsi?
Transcription muaj plaub kauj ruam: Pib. Lub DNA molecule unwinds thiab sib cais los tsim ib tug me me qhib complex. Elongation. RNA polymerase txav raws tus qauv strand, ua ke ntawm mRNA molecule. Kev txiav txim. Hauv prokaryotes muaj ob txoj hauv kev uas tau txiav tawm. Kev ua haujlwm
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Dab tsi yog cov kauj ruam rau kev sau ntawv?
Transcription yuav siv sij hawm qhov chaw nyob rau hauv peb kauj ruam: pib, elongation, thiab termination. Cov kauj ruam tau piav qhia hauv daim duab hauv qab no. Initiation yog qhov pib ntawm transcription. Nws tshwm sim thaum lub enzyme RNA polymerase khi rau thaj tsam ntawm cov noob hu ua tus txhawb nqa