2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Kev hloov pauv hloov pauv hloov pauv kev lag luamthiab yog li hloov lub ntiaj teb. Txhua qhov kev tsim kho tshiab uas tawm los ntawm kev hloov pauv kev lag luam tau txais txiaj ntsig los ntawm kev sib hloov pauv, lub tshuab nqus tsev, tshuab xaws, xov tooj, thiab ntau dua.
Dab tsi yog qhov hloov pauv tau siv rau hauv Kev Hloov Kho Kev Lag Luam?
Hloov pauv qhov chaw, nrov hauv Asmeskas thaum Eli Whitney siv lawv los sib sau musketsnyob rau thawj xyoo ntawm lub xyoo pua 19th, tso cai rau cov neeg ua haujlwm tsis txawj ntse los tsim cov riam phom loj thiab sai. ntawm tus nqi qis, thiab kho thiab hloov cov khoom yooj yim infinitely.
Thaum twg yog qhov hloov pauv tau tsim tawm?
In 1798, Whitney's armory pioneered siv cov khoom sib hloov, uas yog ze li qhov zoo tib yam uas tuaj yeem ua tau yooj yim loj tsim thiab hloov. Lub armory hu ua Eli Whitney Armory lossis Whitneyville Armory.
xyoo twg yog qhov hloov pauv tau?
In 1798 Eli Whitney tau tsim lub chaw tsim phom nyob ze New Haven. Cov muskets nws cov neeg ua haujlwm tau ua los ntawm cov txheej txheem piv rau cov khoom siv niaj hnub no yog thawj zaug kom muaj cov qauv, sib hloov tau.
Dab tsi yog sib pauv tau?
Kev hloov pauv tau yog qhov lub tswv yim ntawm kev tsim qhov zoo ib yam lossis ze li qhov zoo ib yam los ua pawg tsim. Cov nocov khoom tuaj yeem muab tso ua ke los tsim cov khoom lag luam. Piv txwv li, tsheb, khoos phis tawj, rooj tog zaum, yuav luag txhua yam khoom siv niaj hnub no, yog tsim los ntawm cov khoom sib hloov.
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?
Puas yog kev ua haujlwm thaum lub sijhawm muaj kev hloov pauv?
Cov neeg ua haujlwm txom nyem feem ntau nyob hauv tsev kaw ntom nti, tag nrho lub quarter tsis txaus. Cov xwm txheej ua haujlwm tau nyuaj thiab nthuav tawm cov neeg ua haujlwm rau ntau qhov kev pheej hmoo thiab kev phom sij, suav nrog thaj chaw ua haujlwm nruj nrog qhov cua tsis zoo, raug mob los ntawm cov tshuab, raug mob rau cov hlau hnyav, plua plav, thiab cov kuab tshuaj.
