Cov txheej txheem:

Dab tsi yog peb txoj hauv kev uas cov hlwb eukaryotic tuaj yeem tswj cov noob qhia?
Dab tsi yog peb txoj hauv kev uas cov hlwb eukaryotic tuaj yeem tswj cov noob qhia?

Video: Dab tsi yog peb txoj hauv kev uas cov hlwb eukaryotic tuaj yeem tswj cov noob qhia?

Video: Dab tsi yog peb txoj hauv kev uas cov hlwb eukaryotic tuaj yeem tswj cov noob qhia?
Video: TSIS YOG PEB UA HAUJ LWM ZOO .\\ N.TSHUAV NUM |\ N.IAM VAJ XOB \\ N.TXOOV KAV NKAUJ 2023 2024, Kaum ib hlis
Anonim

Eukaryotic noob qhia tuaj yeem tswj tau ntawm ntau theem

  • Chromatin accessibility. Cov qauv ntawm chromatin (DNA thiab nws cov txheej txheem proteins) ua tau raug tswj.
  • Kev sau ntawv. Kev hloov pauv yog qhov tseem ceeb ntawm kev tswj hwm rau ntau tus noob .
  • Kev ua haujlwm RNA.

Tsis tas li ntawd, ob txoj hauv kev uas cov hlwb eukaryotic tswj cov noob qhia li cas?

Eukaryotic noob qhia yog tswj Thaum lub sij hawm transcription thiab RNA ua, uas tshwm sim nyob rau hauv lub nucleus, thiab thaum lub sij hawm cov protein translation, uas tshwm sim nyob rau hauv lub cytoplasm. Ntxiv mus kev cai tuaj yeem tshwm sim los ntawm kev hloov pauv tom qab kev hloov pauv ntawm cov protein.

Tom qab ntawd, lo lus nug yog, dab tsi yog peb lub tswv yim los ntawm cov txheej txheem kev hloov pauv uas tswj eukaryotic noob qhia? Txawm li cas los xij, tsis zoo li cov hlwb prokaryotic, cov eukaryotic tshuaj RNA polymerase xav tau lwm cov proteins, lossis cov ntsiab lus ntawm kev txhais lus , kom yooj yim kev sau ntawv pib. Transcription yam yog cov proteins uas khi rau qhov kev txhawb nqa ib ntus thiab lwm yam kev tswj hwm kom tswj tau kev sau ntawv ntawm lub hom phiaj noob.

Ib tug kuj yuav nug, ua li cas eukaryotic hlwb tswj cov noob qhia?

Gene qhia hauv eukaryotic hlwb yog tswj los ntawm repressors thiab los ntawm transcriptional activators. Zoo li lawv cov prokaryotic counterparts, eukaryotic tshuaj repressors khi rau tej DNA ib ntus thiab inhibit transcription. Lwm cov neeg tawm tsam sib tw nrog cov activators rau kev khi rau cov kev cai tshwj xeeb.

Yam dab tsi tswj cov kev qhia gene?

Cov hauv qab no yog cov npe ntawm cov theem uas cov noob qhia tau tswj hwm, qhov feem ntau siv cov ntsiab lus yog Transcription Initiation:

  • Chromatin domains.
  • Kev sau ntawv.
  • Post-transcriptional hloov kho.
  • RNA thauj.
  • Kev txhais lus.
  • Kev degradation ntawm mRNA.

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