Cov txheej txheem:
- Puas prokaryotes muaj ib qho keeb kwm ntawm kev rov ua dua?
- Vim li cas prokaryotes tsuas muaj ib lub hauv paus ntawm kev rov ua dua?
- Muaj pes tsawg lub hauv paus ntawm kev rov ua dua pom hauv prokaryotes?
- Puas prokaryotes thiab eukaryotes muaj tib lub hauv paus chiv keeb ntawm DNA replication?
Video: Puas prokaryotes puas muaj ib lub hauv paus ntawm kev rov ua dua?
2024 Tus sau: Fiona Howard | [email protected]. Kawg hloov kho: 2024-01-10 06:38
DNA replication pib ntawm lub hauv paus pib ntawm replication. Tseem tsuas yog ib qho keeb kwm hauv prokaryotes (hauv E. coli, oriC) thiab nws yog tus yam ntxwv los ntawm cov arrays ntawm rov ua ntu zus.
Puas prokaryotes muaj ib qho keeb kwm ntawm kev rov ua dua?
Nyob rau hauv cov hlwb prokaryotic, tsuas muaj ib qho chaw ntawm keeb kwm, kev rov ua dua tshwm sim nyob rau hauv ob qho kev tawm tsam tib lub sijhawm, thiab tshwm sim hauv cell cytoplasm. Eukaryotic hlwb ntawm qhov tod tes, muaj ntau lub ntsiab lus ntawm keeb kwm, thiab siv unidirectional replication nyob rau hauv lub nucleus ntawm lub cell.
Vim li cas prokaryotes tsuas muaj ib lub hauv paus ntawm kev rov ua dua?
Nyob rau hauv prokaryotic genome, tib lub hauv paus chiv keeb ntawm replication muaj ntau A-T puag khub, uas muaj tsis muaj zog hydrogen bonding dua G-C puag khub, thiab ua kom yooj yim rau DNA strands rau cais. Ib qho enzyme hu ua helicase unwinds DNA los ntawm kev rhuav tshem cov hydrogen bonds ntawm cov nitrogenous puag khub.
Muaj pes tsawg lub hauv paus ntawm kev rov ua dua pom hauv prokaryotes?
Prokaryotic genomes muaj ib lossis ob peb chromosomes [1], feem ntau yog ncig [2]. Cov chromosomes muaj ob txoj kab sib luag DNA sib luag, thiab yuav tsum muaj ib lub hauv paus ntawm kev rov ua dua(eubacteria) [3] lossis tej zaum yuav muaj ib zaug lossis ntau lub hauv paus (archaea) [4].
Puas prokaryotes thiab eukaryotes muaj tib lub hauv paus chiv keeb ntawm DNA replication?
Ob leeg eukaryotic thiab prokaryotic DNA polymerases tsim tawm RNA primers ua los ntawm primase. Eukaryotic DNA replication yuav tsum tau muaj ntau yam replication diav rawg, thaum prokaryotic replication siv ib lub hauv paus chiv keebkom sai replicate tag nrho genome.
Pom zoo:
Magnolia cov hauv paus hniav puas ua puas lub hauv paus?
Txawm li cas los xij, cov cag ntoo magnolia tsis suav tias yog qhov cuam tshuam thiab muaj peev xwm ua kom puas tsuaj raws li qee cov hauv paus hniav. Tab sis lawv kev sib kis loj tuaj yeem cuam tshuam rau lub hauv paus tsis muaj zog Cov ntoo magnolia loj tuaj yeem ua rau muaj teeb meem hauv lub hauv paus yog tias lawv thaiv phab ntsa hauv tsev los ntawm tshav ntuj thiab tsim cov dej ntub dej .
Yuav tsum muaj kev txawj ntse ua ntej kev paub dhau los ntawm kev rov pib dua?
Tshaj koj qhov kev txawj ntse ua ntej koj qhov kev paub dhau los yuav muaj xim rau koj daim ntawv qhia ua haujlwm tag nrho raug tshuaj xyuasthiab pab qhia koj zaj dab neeg ua haujlwm. Yog tias koj ua haujlwm hauv kev ua haujlwm uas qhov kev txawj ntse yog qhov tseem ceeb, koj kuj yuav xav muab koj cov txuj ci rau saum toj .
Dab tsi ntawm cov hauv qab no txo qis los ntawm laminating lub hauv paus ntawm lub tshuab hloov pauv?
Dab tsi ntawm cov hauv qab no txo qis los ntawm laminating lub hauv paus ntawm lub tshuab hloov pauv? Hysteresis poob . Lub hom phiaj ntawm laminating cov tub ntxhais hauv lub transformer yog dab tsi? Cov tub ntxhais hlau ntawm lub tshuab hloov pauv yog laminated nrog cov ntawv nyias;
Puas muaj txoj hauv kev ntawm kev sib tshuam tsis muaj kev hla kev?
Yog tsis muaj kev hla kev, qhov chaw nyab xeeb tshaj rau cov neeg taug kev hla txoj kev yog ntawm kev sib tshuam. Cov neeg tsav tsheb muaj txoj cai ntawm txhua qhov chaw uas tsis yog kev sib tshuam thiab cim kev hla kev . Leej twg muaj txoj cai ntawm txoj kev sib tshuam?
Thaum lub sijhawm rov ua dua tshiab muaj kev rov yug dua tshiab ntawm kev txaus siab?
Renaissance txhais tau tias kev rov yug dua tshiab ntawm kev txaus siab hauv kos duab thiab kev kawm. Kev kos duab cuam tshuam los ntawm cov qauv thiab cov txheej txheem ntawm ancient Greece thiab Rome . Lub Renaissance yog kev rov yug dua tshiab ntawm dab tsi?
