Video: Yuav ua li cas yuav tsum tshwm sim rau transcription ntawm lac operon?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Qhov twg hauv qab no yuav tsum tshwm sim rau transcription ntawm lac operon gene rau coj qhov chaw ? Cov protein repressor khi rau DNA molecule, thiab RNA polymerase poob. Lactose raug tshem tawm ntawm qhov system. Lub repressor protein poob tawm ntawm DNA molecule, thiab RNA polymerase khi rau tus txhawb nqa.
Cov lus nug tseem yog, dab tsi yog tus qauv lac operon siv los ua qauv qhia?
Cov lac operon ua yog ib ua haujlwm , los yog pab pawg ntawm cov noob nrog ib tus neeg txhawb nqa (tau sau ua ib qho mRNA). Cov noob nyob rau hauv ua haujlwm encode proteins uas tso cai rau cov kab mob siv lactose raws li lub zog qhov chaw.
Kuj Paub, dab tsi ua rau lub lac operon? Cov ua Operon : Ib Inducer Operaon . Cov lac operon ua yog inducible ua haujlwm uas siv lactose raws li lub zog qhov chaw thiab yog qhib thaum cov piam thaj tsawg thiab lactose yog tam sim no.
Tom qab ntawd, ib tus tuaj yeem nug, dab tsi yog qhov kev hloov pauv dav dav thiab lawv ua haujlwm li cas?
A transcription factor yog ib qho protein uas khi rau DNA ib ntus (txhim kho lossis txhawb nqa), ib leeg lossis nrog lwm cov proteins hauv qhov nyuaj, rau tswj tus nqi ntawm kev sau ntawv cov ntaub ntawv genetic los ntawm DNA rau neeg xa xov liaison RNA los ntawm kev txhawb nqa (ua haujlwm ua haujlwm) lossis thaiv (ua haujlwm raws li tus neeg tawm tsam)
Dab tsi yog peb cov txheej txheem los ntawm cov txheej txheem kev hloov pauv uas tswj hwm 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.
Pom zoo:
Yuav ua li cas tshwm sim rau tam sim no nyob rau hauv ib tug parallel circuits thaum ntxiv qhov muag teev?
Raws li ntau qhov muag tau ntxiv, qhov tam sim no nce. Raws li ntau resistors ntxiv nyob rau hauv parallel, tag nrho tam sim no lub zog nce. Yog li ntawd, tag nrho cov tsis kam ntawm Circuit Court yuav tsum tau txo. Qhov tam sim no nyob rau hauv txhua lub teeb yog tib yam vim hais tias tag nrho cov qhov muag teev glowed nrog tib brightness
Tus qauv yuav pab nrhiav qhov tshwm sim ntawm qhov kev tshwm sim sib xyaw li cas?
Lub ntsiab lus ntawm Qhov Muaj Peev Xwm Txheej Txheej Txheej Txheej Txheej Txheej Txheej Txheej Txheej Txheej Txheej Txheej yog ib qho uas muaj ntau tshaj li qhov ua tau. Kev txiav txim siab qhov yuav tshwm sim ntawm qhov kev tshwm sim sib xyaw suav nrog kev nrhiav cov lej ntawm qhov tshwm sim ntawm tus kheej cov xwm txheej thiab, yog tias tsim nyog, tshem tawm qhov muaj feem sib tshooj
Dab tsi yuav tsum tshwm sim rau ib tus neeg los qhia txog qhov zoo ntawm polygenic?
Los qhia txog qhov zoo ntawm polygenic: A) cov noob yuav tsum cuam tshuam nrog ib puag ncig. ob peb lub noob yuav tsum ua ua ke. C) Ntau yam kev hloov pauv yuav tsum tshwm sim hauv tib tsev neeg
Yuav ua li cas koj pom qhov tshwm sim ntawm qhov tshwm sim tsawg kawg ib zaug?
Txhawm rau xam qhov tshwm sim ntawm qhov tshwm sim tshwm sim tsawg kawg ib zaug, nws yuav yog qhov sib ntxiv ntawm qhov xwm txheej tsis tshwm sim. Qhov no txhais tau hais tias qhov tshwm sim ntawm qhov tshwm sim yeej tsis tshwm sim thiab qhov tshwm sim ntawm qhov tshwm sim tsawg kawg ib zaug yuav sib npaug, lossis 100% txoj hauv kev
Yuav ua li cas yuav tsum tshwm sim rau electrons los tsim spectral kab?
Thaum cov electrons txav los ntawm qib siab zog mus rau qis dua, photons raug tso tawm, thiab cov kab hluav taws xob tuaj yeem pom hauv spectrum. Cov kab nqus tau pom thaum electrons nqus photons thiab txav mus rau qib siab zog. Yog hais tias lub atom tau poob ib los yog ntau dua electrons, nws yog hu ua ion thiab hais tias yuav ionized