Video: Koj piav qhia txog kev hloov pauv li cas?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Ib gene kev hloov pauv yog ib qho kev hloov pauv mus tas li hauv DNA ib ntus uas ua rau cov noob, xws li qhov sib txawv ntawm qhov pom hauv tib neeg feem ntau. Kev hloov pauv qhov loj me; lawv tuaj yeem cuam tshuam qhov twg los ntawm ib qho DNA tsev thaiv (hauv paus khub) mus rau ib ntu loj ntawm chromosome uas suav nrog ntau cov noob.
Hais txog qhov no, koj piav qhia txog kev hloov pauv li cas?
A Kev hloov pauv tshwm sim thaum DNA gene puas lawm los yog hloov nyob rau hauv xws li ib txoj kev los hloov cov genetic lus nqa los ntawm cov noob. Mutagen yog ib tus neeg sawv cev ntawm cov khoom uas tuaj yeem ua rau muaj kev hloov pauv mus tas li rau lub cev muaj pes tsawg leeg ntawm DNA gene xws li cov lus genetic hloov.
Kuj Paub, 4 hom kev hloov pauv yog dab tsi? Muaj peb hom DNA Mutations: lub hauv paus hloov, tshem tawm thiab ntxig.
- Kev hloov pauv hauv paus. Ib qho kev hloov pauv yog hu ua point mutations, nco qab qhov kev hloov pauv ntawm Glu --- Val uas ua rau mob qog nqaij hlav.
- Kev tshem tawm.
- Insertions.
Kuj paub yog, dab tsi yog mutation nrog piv txwv?
A kev hloov pauv yog ib qho kev hloov pauv uas tshwm sim hauv peb cov DNA ib ntus, vim yog qhov yuam kev thaum DNA tau theej los yog los ntawm ib puag ncig yam xws li UV teeb thiab luam yeeb. Kev hloov pauv kuj tuaj yeem tshwm sim los ntawm kev cuam tshuam rau ib puag ncig xws li haus luam yeeb, hnub ci thiab hluav taws xob.
Koj yuav txheeb xyuas DNA hloov pauv li cas?
Tag nrho exploit ib los yog ntau tshaj ntawm cov yam ntxwv ntawm DNA los yog cov enzymes uas ua rau nws. Ib khub hauv paus kev hloov pauv tuaj yeem yog txheeb xyuas los ntawm ib qho ntawm cov hauv qab no: Direct sequencing, uas koom nrog kev txheeb xyuas txhua tus neeg hauv paus khub, ua ntu zus, thiab sib piv cov kab ke mus rau qhov qub gene.
Pom zoo:
Koj piav qhia txog kev hloov pauv hauv cov kab mob li cas?
Cov khoom ntawm DNA lossis cov noob paj noob hlis yog txiav los ntawm nws qhov qub DNA uas siv cov enzyme txwv thiab tom qab ntawd muab tso rau hauv plasmid los ntawm ligation. Lub plasmid uas muaj cov DNA txawv teb chaws yog tam sim no npaj tau muab tso rau hauv cov kab mob. Txoj kev no hu ua transformation
Vim li cas tom qab kev hloov pauv kev hloov pauv tseem ceeb?
Kev hloov pauv tom qab kev txhais lus (PTMs) xws li glycosylation thiab phosphorylation ua lub luag haujlwm tseem ceeb ntawm kev ua haujlwm ntawm hemostatic proteins thiab tseem ceeb heev hauv kev teeb tsa kab mob. Xws li theem nrab hloov pauv rau cov proteins hemostatic muaj ntau yam cuam tshuam rau lawv lub peev xwm los cuam tshuam nrog lwm cov proteins
Dab tsi yog qhov txawv ntawm ib puag ncig kev hloov pauv thiab kev hloov pauv qub txeeg qub teg?
Qhov sib txawv ntawm cov yam ntxwv ntawm cov tib neeg ntawm tib hom yog hu ua variation. Qhov no yog inherited variation. Qee qhov kev hloov pauv yog qhov tshwm sim ntawm qhov sib txawv ntawm ib puag ncig, lossis ib tus neeg ua dab tsi. Qhov no yog hu ua environmental variation
Thaum ib qho kev sib cais ua rau muaj kev hloov pauv hloov pauv ntawm lub ntiaj teb nce ntxiv?
Txij li thaum lub kaw lus raug cais tawm, tsis muaj cua sov tuaj yeem khiav tawm (tus txheej txheem yog li adiabatic), yog li thaum lub zog ntws tawm hauv lub cev, qhov entropy ntawm qhov system nce, piv txwv li Δ Ssys> 0. Yog li ntawd, lub entropy ntawm lub system yuav tsum tau nce rau ib tug spontaneous txheej txheem nyob rau hauv no cais system
Koj piav qhia txog ib qho kev hloov pauv li cas?
VIDEO Ib yam li ntawd, tib neeg nug, koj piav qhia txog kev hloov pauv hauv lej li cas? Muaj plaub yam tseem ceeb ntawm kev hloov pauv : translation, rotation, reflection and dilation. Cov no kev hloov pauv poob rau hauv ob pawg: nruj kev hloov pauv uas tsis hloov cov duab lossis qhov loj ntawm qhov preimage thiab tsis nruj kev hloov pauv uas hloov qhov loj me tab sis tsis zoo li tus preimage.