2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Kev Kawm tuaj yeem txhawb kev lag luam kev loj hlob ncaj qha, los ntawm kev tsim kho tshiab, tsim khoom tsim tau, thiab tib neeg peev. Thiab kev kawm tseem muaj keeb kwm ntawm kev txhawb nqa kev hloov pauv hauv zej zog, los ntawm kev txhawb nqa tej yam xws li kev koom tes hauv kev nom kev tswv, kev muaj vaj huam sib luag, thiab kev ruaj ntseg ib puag ncig.
Kev kawm yuav txhim kho tib neeg li cas?
Nws pab neeg ua pej xeem zoo, tau txais txoj haujlwm zoo dua, qhia qhov txawv ntawm qhov zoo thiab qhov tsis zoo. Kev kawm qhia peb txog qhov tseem ceeb ntawm kev ua haujlwm hnyav thiab, tib lub sijhawm, pab peb loj hlob thiab txhim kho. Yog li ntawd, peb muaj peev xwm ua kom lub neej zoo dua nyob hauv kev paub thiab hwm txoj cai, kev cai, thiab kev tswj hwm.
Kev kawm yuav hloov koj lub neej li cas?
Kev kawm muab kev paub txog lub ntiaj teb nyob ib puag ncig peb thiab hloov pauv mus rau ib yam zoo dua. Nws tsim nyob rau hauv peb qhov kev xav ntawm saib lub neej. Nws pab peb tsim cov kev xav thiab muaj cov ntsiab lus ntawm kev xav txog tej yam hauv lub neej. … Kev kawm ua rau peb txawj txhais tej yam, thiab lwm yam.
Kev kawm cuam tshuam rau koj lub neej yav tom ntej li cas?
Koj tau txais kev paub, kev txawj thiab kev paub los pab koj ob leeg hauv koj txoj haujlwm thiab hauv lub neej. Ntxiv rau qhov ntawd, los ntawm kev tau txais cov txuj ci ntxiv hauv kev sib txuas lus thiab kev daws teeb meem thiab ua tiav koj lub hom phiaj, koj tuaj yeem ua rau koj muaj kev ntseeg siab ntxiv.
Lub hom phiaj ntawm kev kawm yog dab tsi?
Lub hom phiaj tseem ceeb ntawm kev kawm yog kev txhim kho ib txwm muajneeg. Tsis tas li ntawd, nws yog lub hauv paus ntawm nws cov txiaj ntsig pom tseeb rau lub neej kom puv thiab zoo dua. Kev kawm ntawv tuaj yeem ua rau muaj kev sib raug zoo hauv zej zog tag nrho. Nws txhim kho lub zej zog uas tib neeg paub txog lawv txoj cai thiab lub luag haujlwm.
Pom zoo:
Dab tsi yog qhov hloov pauv thiab hloov pauv hloov pauv?
Point mutations hloov ib leeg nucleotide. Frameshift kev hloov pauv yog ntxiv lossis tshem tawm ntawm nucleotides uas ua rau muaj kev hloov pauv hauv kev nyeem ntawv. frameshift thiab point mutation yog dab tsi? Ib qho kev hloov pauv cuam tshuam rau ib khub hauv paus.
Qhov kev hloov pauv no puas yuav ua rau muaj kev hloov pauv hloov pauv?
Yog li, yog tias muaj kev hloov pauv, piv txwv li, kev ntxig lossis tshem tawm ntawm nucleotide, tshwm sim, qhov no tuaj yeem ua rau kev hloov pauv ntawm kev nyeem ntawv. Nws hloov tag nrho cov amino acid ib ntus. Cov kev hloov pauv no yog hu ua frameshift mutation (tseem hu ua kev nyeem ntawv hloov pauv, nyeem ntawv hloov pauv, lossis framing yuam kev).
Qhov twg yog qhov kev hloov pauv hloov pauv hloov pauv?
Semiconservative replication piav qhia txog cov txheej txheem ntawm DNA replication nyob rau hauv tag nrho cov paub hlwb. DNA replication tshwm sim ntawm ntau lub hauv paus pib ntawm kev rov ua dua raws DNA qauv strand. Raws li DNA ob chav helix yog unwound by helicase, replication tshwm sim nyias ntawm txhua tus qauv strand nyob rau hauv antiparallel cov lus qhia.
Qhov kev hloov pauv twg yog xav tias yuav cuam tshuam los ntawm kev hloov pauv hloov pauv?
Dependent Variable Qhov sib txawv uas nyob ntawm lwm yam uas ntsuas. Cov kev hloov pauv no yuav tsum tau hloov pauv raws li qhov kev sim ua haujlwm ntawm tus kheej hloov pauv lossis hloov pauv. Nws yog cov nyhuv presumed. Qhov kev tshawb fawb hloov pauv twg yog qhov tshwm sim?
Los ntawm kev hloov pauv hloov pauv hloov pauv?
Kev hloov pauv hloov pauv hloov pauv (TMA) yog qhov isothermal (tsis hloov pauv nucleic acid kub), ib leeg-tube nucleic acid amplification system siv ob lub enzymes, RNA polymerase thiab thim rov qab kev sau ntawv. … Cov txheej txheem no tuaj yeem siv los tsom rau RNA thiab DNA.
