Video: Vim li cas gene qhia ntau nyuaj hauv eukaryotes?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Eukaryotic noob qhia yog ntau complex tshaj prokaryotic gene qhia vim hais tias cov txheej txheem ntawm transcription thiab txhais lus yog lub cev sib cais. Daim ntawv no ntawm kev cai , hu ua epigenetic kev cai , tshwm sim txawm ua ntej transcription pib.
Hauv qhov no, vim li cas kev tswj cov noob qhia ntau dua hauv eukaryotes dua li hauv prokaryotes?
Tag nrho cov kauj ruam tom ntej no tshwm sim. Thaum twg ntau yuav tsum muaj protein ntau, ntau transcription tshwm sim. Yog li ntawd, hauv prokaryotic cell, ua tswj kev qhia gene feem ntau yog nyob rau theem transcriptional. Hauv eukaryotic tshuaj cell, DNA yog muaj nyob rau hauv lub cell lub nucleus uas nws yog transcribed rau hauv RNA.
Tsis tas li ntawd, yog vim li cas gene qhia sai dua hauv cov hlwb prokaryotic? Prokaryotic transcription thiab translation tshwm sim ib txhij nyob rau hauv lub cytoplasm, thiab kev cai tshwm sim nyob rau theem transcriptional. Eukaryotic noob qhia yog tswj tau thaum lub sij hawm transcription thiab RNA ua, uas tshwm sim nyob rau hauv lub nucleus, thiab thaum lub sij hawm lub protein txhais lus, uas tshwm sim nyob rau hauv lub cytoplasm.
Ntxiv mus, dab tsi tswj cov noob qhia hauv eukaryotes?
Gene qhia hauv eukaryotic cov hlwb raug tswj los ntawm cov neeg tawm tsam thiab los ntawm cov neeg ua haujlwm transcriptional. 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.
Vim li cas operons tsis tshua muaj hauv eukaryotes?
Thaum ib ua haujlwm yog transcribed, tag nrho cov genes ntawm lub ua haujlwm nyob rau tib mRNA. Cov neeg ua haujlwm tshwm sim hauv prokaryotes, tab sis tsis eukaryotes . Hauv eukaryotes , txhua lub noob yog tsim los ntawm ib tus neeg mRNAs thiab txhua lub noob muaj nws tus kheej txhawb nqa. Cells tsis tuaj yeem them taus pov tseg lub zog ua cov noob yog tias lawv tsis xav tau.
Pom zoo:
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