Qhov xaus ntawm Avery qhov kev sim yog dab tsi?

Video: Qhov xaus ntawm Avery qhov kev sim yog dab tsi?

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

Avery thiab nws cov npoj yaig tau xaus lus tias cov protein tsis tuaj yeem yog qhov hloov pauv. Tom qab ntawd, lawv tau kho qhov sib xyaw nrog DNA-destroying enzymes. Lub sij hawm no lub colonies ua tsis tau tejyam hloov. Avery xaus lus tias DNA yog cov khoom siv caj ces ntawm lub xovtooj.

Kuj nug, qhov xaus ntawm Oswald Avery qhov kev sim yog dab tsi?

Nyob rau hauv ib qho yooj yim heev kev sim , Oswald Avery's pab pawg tau pom tias DNA yog "txoj cai hloov pauv." Thaum cais tawm ntawm ib hom kab mob, DNA tuaj yeem hloov pauv lwm hom kab mob thiab muab cov yam ntxwv rau qhov thib ob hom. DNA tau nqa cov ntaub ntawv keeb kwm yav dhau los.

Ib yam li ntawd, Avery tau ua pov thawj li cas tias DNA tuaj yeem nqa cov ntaub ntawv caj ces? Oswald Avery , Colin MacLeod, thiab Maclyn McCarty tau qhia tias DNA (tsis muaj protein ntau) ua tau hloov cov khoom ntawm cov hlwb, qhia meej txog cov tshuaj lom neeg ntawm noob . Avery , MacLeod thiab McCarty tau txheeb xyuas DNA raws li "txoj cai hloov pauv" thaum kawm Streptococcus pneumoniae, cov kab mob uas ua tau ua rau mob ntsws.

Hauv qhov no, lub hom phiaj ntawm Avery qhov kev sim yog dab tsi?

Nws xav txiav txim siab seb cov kab mob twg hauv cov kab mob tua hluav taws kub yog qhov tseem ceeb tshaj plaws rau kev hloov pauv. Nws tau rho tawm ib qho sib xyaw ntawm ntau yam molecules los ntawm cov kab mob tua hluav taws kub uas tau ua tib zoo kho nws nrog cov enzymes.

Hershey thiab Chase xaus li cas?

Hershey thiab Chase xaus lus tias DNA, tsis yog protein, yog cov khoom siv caj ces. Lawv txiav txim siab tias lub tsho tiv thaiv protein tau tsim nyob ib ncig ntawm cov kab mob bacteriophage, tab sis hais tias cov DNA sab hauv yog qhov uas tau muab nws lub peev xwm los tsim cov kab mob hauv cov kab mob.

Pom zoo:

Qhov xaus ntawm qhov ntsuas nplaim taws yog dab tsi?

Txheej txheem. Raws li cov txiaj ntsig kev sim, nws muaj kev nyab xeeb los txiav txim siab tias ntau lub ntsiab lus pom cov xim sib txawv thaum raug nplaim taws, thiab muaj cov xim no yog pov thawj ntawm atomic emission. Tsis tas li ntawd, muaj kev sib raug zoo ntawm lub wavelength ntawm ib lub caij thiab cov xim uas nws emits

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 raug zoo ntawm kev ua lej ntawm qhov kev nyuaj siab khov kho thiab Mollality?

Kev nyuaj siab qhov chaw khov kho yog cov cuab yeej sib koom ua ke pom hauv cov kev daws teeb meem uas tshwm sim los ntawm kev qhia txog cov kuab tshuaj molecules rau cov kuab tshuaj. Cov ntsiab lus khov ntawm cov kev daws yog tag nrho qis dua li cov kuab tshuaj ntshiab thiab yog ncaj qha proportional rau molality ntawm cov kuab tshuaj

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