Video: Yuav ua li cas cov kab mob ssDNA replicate?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Ib leeg stranded DNA kab mob ntiav tib daim ntawv sau thiab rov ua dua mechanisms. Los ntawm ssDNA , (+) ssRNA yog tsim los ntawm tus tswv tsev cell RNA polymerase, thiab siv rau hauv kev sau ntawv. Host cell DNA polymerase yog siv rau hauv rov ua dua . Reverse transcriptase yog ib qho enzyme uas replicates DNA los ntawm RNA.
Ib yam li ntawd, tib neeg nug, dsDNA cov kab mob li cas?
Rov ua dua . Poxvirus encodes nws tus kheej machinery rau genome transcription, a DNA nyob ntawm RNA polymerase, uas ua rau rov ua dua nyob rau hauv lub cytoplasm ua tau. Feem ntau dsDNA cov kab mob xav tau lub host cell DNA -dependent RNA polymerase los ua transcription.
Tom qab ntawd, lo lus nug yog, ua li cas cov kab mob viral replicate? Viral replication Nws suav nrog rau 6 kauj ruam: txuas, nkag mus, uncoating, rov ua dua , sib dhos, thiab tso tawm. Thaum lub sij hawm uncoating, rov ua dua , thiab assembly, lub kab mob DNA lossis RNA suav nrog nws tus kheej mus rau hauv lub xov tooj ntawm tes cov khoom siv caj ces thiab induces nws rov ua dua tus kab mob genome.
Ib tug kuj yuav nug, cov kab mob puas tuaj yeem hloov lawv tus kheej DNA?
Feem ntau ob-stranded DNA cov kab mob replicate Nyob rau hauv lub host cell nucleus, xws li polyomaviruses, adenoviruses, thiab herpesviruses-poxviruses, txawm li cas los xij, rov ua dua hauv cytoplasm. Adenoviruses thiab herpes kab mob encode lawv tus kheej replication yam.
Cov kab mob puas yog ib leeg lossis ob leeg tso tseg?
Ib DNA kab mob vais lav yog a kab mob vais lav uas muaj DNA ua nws cov khoom siv caj ces thiab rov ua dua siv DNA-dependent DNA polymerase. Cov nucleic acid feem ntau yog ob npaug - tso tseg DNA (dsDNA) tab sis kuj yog ib leeg - tso tseg DNA (ssDNA). Ib leeg - tso tseg DNA feem ntau yog nthuav mus rau ob npaug - tso tseg nyob rau hauv cov kab mob.
Pom zoo:
Cov kab mob puas kis cov kab mob eukaryotic?
Ib lub cell uas muaj kab mob ua rau cov kab mob kis tau ntau dua thiab cov khoom siv caj ces es tsis yog nws cov khoom qub. Qee cov kab mob yuav nyob twj ywm hauv cov tswv tsev rau lub sijhawm ntev, ua rau tsis muaj kev hloov pauv hauv lawv cov tswv tsev (ib theem hu ua lysogenic theem). Cov kab mob ua rau muaj ntau yam kab mob hauv eukaryotes
Cov tshuaj tua kab mob twg thaiv cov kab mob protein ntau?
Tetracyclins yog ib hom tshuaj tua kab mob uas suav nrog cov thawj tetracycline nrog rau doxycycline thiab minocycline. Cov tshuaj tua kab mob no khi rau A qhov chaw ntawm 30s ribosome, tiv thaiv tRNA los ntawm kev nqa cov amino acids tshiab. Yog tias tRNA tsis tuaj yeem txuas mus rau ribosome, ces tsis muaj cov proteins tshiab tuaj yeem ua tau
Cov kab mob thiab cov kab mob ua haujlwm zoo li cas?
Ob leeg cov kab mob thiab cov kab mob muaj cov phab ntsa ntawm tes (txawm hais tias sib txawv hauv cov qauv thiab muaj pes tsawg leeg) Feem ntau cov kab mob thiab cov kab mob tau txais lub zog los ntawm kev ua pa aerobic (ua pa hauv cov kab mob me ntsis txawv dua li hauv Eukaryotes tab sis cov pa oxygen ib txwm xav tau rau oxidise suab thaj, hauv dej kawg. thiab carbon dioxide yog tsim)
Yuav ua li cas cov kab mob tuaj yeem raug mob los ntawm cov ntsev ntau ntawm txoj kev?
Raws li kev soj ntsuam koj tau ua hauv qhov kev ua haujlwm hauv chav kuaj no, piav qhia seb cov kab mob tuaj yeem raug mob li cas los ntawm cov ntsev ntau ntawm txoj kev. Cov kab mob tuaj yeem raug mob vim tias cov dej ntsev yuav ua rau cov dej tsis zoo los ntawm cov kab mob lossis cov nroj tsuag ntawm txoj kev; Lub cev qhuav dej tuaj yeem ua rau puas lossis tua cov hlwb
Vim li cas cov kab mob Gram tsis zoo tshwm liab liab thaum cov kab mob Gram zoo pom ntshav liab?
Gram zoo hlwb stain ntshav vim lawv cov peptotidoglycan txheej yog tuab txaus, txhais tau tias tag nrho cov kab mob Gram zoo yuav khaws lawv cov stain. Gram tsis zoo hlwb stain liab vim lawv muaj ib tug nyias peptidoglycan phab ntsa, thiab lawv yuav tsis khaws ib yam ntawm cov ntshav stain los ntawm crystal violet