Puas yog mRNA synthesized hauv kev txhais lus lossis kev sau ntawv?
Puas yog mRNA synthesized hauv kev txhais lus lossis kev sau ntawv?

Video: Puas yog mRNA synthesized hauv kev txhais lus lossis kev sau ntawv?

Video: Puas yog mRNA synthesized hauv kev txhais lus lossis kev sau ntawv?
Video: Kev hlub tsis ncaj ncees.10/15/2017 2024, Kaum ib hlis
Anonim

Cov mRNA tsim nyob rau hauv kev sau ntawv Nws raug xa tawm los ntawm cov nucleus, mus rau cytoplasm, mus rau ribosome (lub cell cov protein. synthesis Hoobkas). Cov txheej txheem uas mRNA qhia cov protein synthesis nrog kev pab ntawm tRNA hu ua txhais lus . Lub ribosome yog ib qho loj heev ntawm RNA thiab protein molecules.

Xav txog qhov no, puas yog mRNA synthesized hauv kev txhais lus?

Kev txhais lus ntawm mRNA . Proteins yog ua ke los ntawm mRNA templates los ntawm ib tug txheej txheem uas tau txais kev cawmdim heev thoob plaws hauv evolution (saib nyob rau hauv Tshooj 3). Txhua mRNAs tau nyeem nyob rau hauv 5' mus rau 3' kev taw qhia, thiab polypeptide chains yog ua ke los ntawm cov amino mus rau carboxy terminus.

Yuav ua li cas thaum mRNA transcribed? RNA ces tawm ntawm lub nucleus thiab mus rau ib tug ribosome nyob rau hauv lub cytoplasm, qhov twg txhais tshwm sim . Kev txhais lus nyeem cov noob caj noob ces hauv mRNA thiab ua kom muaj protein ntau. Thaum kev sau ntawv , ib strand mRNA yog tsim uas yog complementary rau ib tug strand ntawm DNA. Daim duab hauv qab no qhia tau li cas qhov no tshwm sim.

Ib yam li ntawd, koj tuaj yeem nug, mRNA synthesized li cas thaum transcription?

mRNA yog ua ke nyob rau hauv lub nucleus siv nucleotide sequence ntawm DNA ua tus qauv. Cov txheej txheem no yuav tsum muaj nucleotide triphosphates ua substrates thiab yog catalyzed los ntawm enzyme RNA polymerase II. Cov txheej txheem ntawm kev ua mRNA los ntawm DNA yog hu ua kev sau ntawv , thiab nws tshwm sim nyob rau hauv lub nucleus.

Puas yog rRNA transcription lossis txhais?

rRNA tsis tau muab txhais ua cov proteins ntawm txhua yam. Transcribed rRNA yog khi rau ribosomal proteins los tsim cov subunits ntawm ribosomes thiab ua raws li lub cev qauv uas thawb mRNA thiab tRNA los ntawm ribosome los ua thiab txhais lawv.

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