Avery ua dab tsi hauv nws qhov kev sim?

Video: Avery ua dab tsi hauv nws qhov kev sim?

2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36

Oswald Avery (c. 1930) Hauv ib qho yooj yim heev kev sim , Oswald Avery cov pab pawg pom tias DNA yog txoj cai "transforming." Thaum cais tawm ntawm ib hom kab mob, DNA yog muaj peev xwm hloov tau lwm hom kab mob thiab confer yam ntxwv rau qhov thib ob hom. DNA yog nqa cov ntaub ntawv keeb kwm yav dhau los.

Ib yam li ntawd, koj tuaj yeem nug, Avery siv dab tsi hauv nws qhov kev sim?

Lub Avery - MacLeod-McCarty kev sim yog ib kev sim Kev ua qauv qhia, tshaj tawm xyoo 1944 los ntawm Oswald Avery , Colin MacLeod, thiab Maclyn McCarty, DNA yog tus tshuaj uas ua rau cov kab mob hloov pauv, nyob rau hauv ib lub sij hawm thaum nws muaj tau dav ntseeg tias nws yog cov protein uas ua haujlwm tus muaj nuj nqi ntawm nqa cov caj ces

Qhov thib ob, lub hom phiaj ntawm Griffith qhov kev sim yog dab tsi? Griffith cov npe 1928 kev sim qhia peb tias cov kab mob tuaj yeem hloov pauv lawv txoj haujlwm thiab daim ntawv los ntawm kev hloov pauv. Transformation yog tus txheej txheem uas piav txog ib yam uas hloov mus rau lwm qhov. Hauv nws kev sim , Griffin txhaj ob hom streptococcus pneumoniae, Hom III-S thiab Hom II-R, rau hauv nas.

Ntxiv mus, Avery MacLeod thiab McCarty qhov kev sim qhia dab tsi?

Oswald Avery , Colin MacLeod , thiab Maclyn McCarty qhia tias DNA (tsis yog proteins) tuaj yeem hloov cov khoom ntawm cov hlwb, qhia meej txog cov tshuaj ntawm cov noob. Avery , MacLeod thiab McCarty txheeb xyuas DNA raws li "txoj cai hloov pauv" thaum kawm Streptococcus pneumoniae, cov kab mob uas tuaj yeem ua rau mob ntsws.

Cov kev sim ua los ntawm Griffith zoo ib yam li cov ua los ntawm Avery MacLeod thiab McCarty li cas?

Enzymes tau siv nyob rau hauv Kev sim ua los ntawm Avery , MacLeod, thiab McCarty thaum Griffith hloov hlwb los yog siv cov cua sov. Txawm tias Griffith thawj pom kev hloov pauv, Avery , MacLeod, thiab McCarty muab pov thawj uas DNA tsis yog protein lossis RNA yog tus neeg sawv cev transforming.

Pom zoo:

Dab tsi tshwm sim ntawm Theodor Engelmann qhov kev sim nto moo qhia rau nws uas wavelength S yog tus tsav tsheb zoo tshaj plaws ntawm photosynthesis?

Cov kab mob sib sau ua ke ntau tshaj plaws nyob ze ntawm ib feem ntawm cov alga uas tau nthuav tawm cov xim liab thiab xiav wavelengths. Engelmann qhov kev sim ua kom pom tias lub teeb liab thiab xiav yog lub zog zoo tshaj plaws rau photosynthesis

Dab tsi yog qhov kev sib txuas ntawm kev txheeb cais hauv qhov tshwm sim?

Qhov yuav tshwm sim thiab kev txheeb cais yog cov cheeb tsam ntawm kev ua lej uas cuam tshuam lawv tus kheej nrog kev txheeb xyuas qhov txheeb ze ntawm cov xwm txheej. Qhov tshwm sim muaj feem cuam tshuam nrog kev kwv yees qhov yuav tshwm sim ntawm cov xwm txheej yav tom ntej, thaum cov txheeb cais suav nrog kev txheeb xyuas qhov zaus ntawm cov xwm txheej yav dhau los

Vim li cas nws tseem ceeb uas yuav tsum rov ua qhov kev sim thiab sim cov kev xav hauv ntau txoj kev?

Nws yog ib qho tseem ceeb rau cov kws tshawb fawb kom rov sim dua thaum ua qhov kev sim vim tias qhov kev txiav txim siab yuav tsum raug lees paub. Muaj tseeb vim tias cov txiaj ntsig ntawm txhua qhov kev xeem yuav tsum zoo sib xws. Lwm cov kws tshawb fawb yuav tsum tuaj yeem rov ua koj qhov kev sim thiab tau txais cov txiaj ntsig zoo sib xws. Tib txoj hauv kev los ntsuas qhov kev xav yog ua qhov kev sim

Dab tsi yog qhov kev ua yuam kev hauv kev sim nrog cov hluav taws xob tam sim no?

Cov peev txheej ntawm kev ua yuam kev suav nrog cov cuab yeej, ib puag ncig, txheej txheem, thiab tib neeg. Tag nrho cov kev ua yuam kev no tuaj yeem ua tsis tau lossis ua haujlwm nyob ntawm seb lawv cuam tshuam li cas. Instrumental yuam kev tshwm sim thaum cov cuab yeej siv tsis raug, xws li qhov sib npaug uas tsis ua haujlwm (SF Fig