Video: Puas yog cov tshuaj tiv thaiv thiab silencers hauv prokaryotes?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Hauv genetics, ib ua kom zoo yog ib qho luv luv (50-1500 bp) thaj tsam ntawm DNA uas tuaj yeem khi los ntawm cov proteins (activators) kom ua rau muaj qhov kev hloov pauv ntawm ib qho gene yuav tshwm sim. Muaj ntau pua txhiab tus tshuaj kho kom zoo nyob rau hauv tib neeg genome. Lawv pom nyob rau hauv ob qho tib si prokaryotes thiab eukaryotes.
Piv txwv li, puas prokaryotes muaj silencers?
Cov noob ntawm prokaryotes tau ua ke ua ke raws li cov haujlwm zoo sib xws rau hauv cov chav hu ua operons uas muaj tus txhawb nqa thiab tus neeg ua haujlwm. Tus neeg teb xov tooj yog qhov chaw khi rau tus neeg tawm tsam thiab yog li ntawd muaj muaj nuj nqi sib npaug rau cov Silencer cheeb tsam hauv Eukaryotic DNA.
Kuj Paub, cov kab mob puas muaj cov tshuaj ntxiv? Ib zaug xav tias nws yog qhov tshwj xeeb rau eukaryotes, ua kom zoo -zoo li cov ntsiab lus muaj tau pom nyob rau hauv ntau yam ntawm kab mob . Cov kev tswj hwm cov protein uas khi rau cov no Cov kab mob ua kom zoo yuav tsum hu rau RNA polymerase kom qhib cov ntawv sau. Paradigms rau txhua txoj hauv kev no muaj nyob hauv kab mob tshuab.
Nyob rau hauv no, dab tsi yog enhancer thiab Silencer?
Txhim kho muaj peev xwm ua kom muaj kev nthuav qhia ntau ntawm cov noob hauv lawv thaj chaw. Tsis ntev los no, cov ntsiab lus tau pom tias txo qis kev hloov pauv ntawm cov noob nyob sib ze, thiab cov ntsiab lus no tau hu ua cov neeg nyob ntsiag to.
Dab tsi yog qhov txawv ntawm ib qho enhancer thiab tus activator?
Txhim kho : Ib ua kom zoo yog DNA ib ntus uas txhawb nqa kev hloov pauv. Txhua ua kom zoo yog tsim los ntawm luv DNA sequences hu ua distal tswj ntsiab. Activators khi rau lub distal tswj ntsiab cuam tshuam nrog mediator proteins thiab transcription yam.
Pom zoo:
Vim li cas cov tshuaj tiv thaiv kev zom zaub mov hu ua hydrolysis cov tshuaj tiv thaiv?
Thaum lub sij hawm zom mov, piv txwv li, decompositionreactions zom cov zaub mov loj rau hauv cov me me los ntawm kev ntxiv cov dej molecules. Hom tshuaj no hu ua hydrolysis. Raws li dej absorbs heatenergy, qee lub zog yog siv los rhuav tshem hydrogenbonds
Puas yog cov tshuaj pleev xim sib xyaw cov tshuaj tiv thaiv?
Tsis yog txhua qhov kev hloov xim qhia tias muaj tshuaj lom neeg. Kev sib xyaw xim tsuas yog hloov lub cev. Tsis muaj cov khoom tshiab tsim. Vim hais tias lub cev thiab tshuaj pleev xim ntawm cov xim siv los ua xim sib txawv, tus nqi thiab qhov deb ntawm lawv mus raws li daim ntawv so ntswg sib txawv, ua rau cov xim sib txawv
Cov tshuaj tiv thaiv zoo li cas thaum cov tshuaj nkag mus rau hauv cov hlab ntsha?
Cov tshuaj tiv thaiv 'systemic' tshwm sim thaum cov tshuaj nkag mus rau hauv cov hlab ntsha los ntawm daim tawv nqaij, qhov muag, qhov ncauj, lossis lub ntsws
Cov tshuaj tiv thaiv dab tsi yog qhov tshuaj tiv thaiv neutralization?
Neutralization yog ib hom tshuaj tiv thaiv nyob rau hauv uas muaj zog acid thiab muaj zog puag react nrog ib leeg los tsim dej thiab ntsev
Dab tsi yog tshuaj lom neeg cov tshuaj tiv thaiv thiab cov tshuaj tiv thaiv lub cev?
Qhov sib txawv ntawm cov tshuaj tiv thaiv lub cev thiab cov tshuaj tiv thaiv tshuaj yog muaj pes tsawg leeg. Hauv cov tshuaj tiv thaiv tshuaj, muaj kev hloov pauv ntawm cov tshuaj hauv nqe lus nug; nyob rau hauv ib qho kev hloov ntawm lub cev muaj qhov sib txawv ntawm qhov tsos, tsis hnov tsw, los yog cov duab yooj yim ntawm cov qauv ntawm cov teeb meem yam tsis muaj kev hloov pauv hauv cov ntsiab lus