2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Qhov ze koj mus rau lwm lub nkoj, qhov kev pheej hmoo ntawm kev sib tsoo ntau dua thiab koj yuav tau ua ntau dua kom dhau ntawm qhov chaw nyab xeeb. Cov kev hloov me me ntawm chav kawm thiab ceev yog qhov txaus ntshai; lawv tsis ntau zaus daws teeb meem thiab lawv tsis muab rau lwm lub nkoj qhia meej tias koj ua dab tsi.
Yuav tsum zam qhov hloov pauv li cas?
(b) Ib qho kev hloov pauv ntawm chav kawm thiab / lossis nrawm kom tsis txhob muaj kev sib tsoo yuav tsum, yog tias qhov xwm txheej ntawm rooj plaub lees paub, loj txaus kom pom meej meej rau lwm lub nkoj saib pom qhov muag lossis los ntawm radar; kev hloov pauv me me ntawm chav kawm thiab / lossis nrawm yuav tsum zam.
Yuav tsum ua li cas kom tsis txhob muaj kev sib tsoo?
Rule 8 - Action to Prevent Collision
(a) Ib qho kev txiav txim kom tsis txhob muaj kev sib tsoo yuav tsum tau ua raws li Txoj Cai ntawm Tshooj Cai no thiab yuav tsum, yog tias muaj xwm txheej cov ntaub ntawv lees paub, ua tau zoo, ua rau lub sijhawm txaus thiab nrog rau kev ua raws li kev ua haujlwm zoo ntawm seamanship.
Yuav ua li cas koj thiaj zam dhau qhov xwm txheej ze ntawm lub quarter thaum koj saib?
Kev qeebfeem ntau yog txoj hauv kev zoo tshaj plaws kom tsis txhob muaj xwm txheej nyob ze. Thaum cov tub ceev xwm saib xyuas, tus tub ceev xwm yuav tsum tau hais qhia luv luv ntawm cov chav kawm, nrawm, tsheb khiav, huab cua thiab kev phom sij rau kev taug kev uas tuaj yeem xav tau.
Yuav ua li cas yuav tsum zam yog tias qhov xwm txheej ntawm rooj plaub lees paub hauv ahla qhov xwm txheej yog tias muaj kev pheej hmoo ntawm kev sib tsoo?
Thaum ob lub nkoj uas muaj zog tsav hla hla kom muaj kev pheej hmoo ntawm kev sib tsoo, lub nkoj uas muaj lwm qhov ntawm nws tus kheej lub hnub qub yuav tsum tawm ntawm txoj kev thiab yuav tsum, yog tias qhov xwm txheej ntawm rooj plaub lees paub, zam kev hla ua ntej ntawm lwm lub nkoj.
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.
