Cov txheej txheem:
- Kev sib xyaw ua ke ua haujlwm li cas?
- Dab tsi yog qhov sib txawv ntawm cov khoom sib xyaw thiab cov tsis sib xyaw ua ke?
- Dab tsi yog qhov sib txawv ntawm qhov sib xyaw ua ke thiab kev hloov pauv yooj yim?
- cov transposons tuaj qhov twg?
Video: Thaum sib xyaw cov transposons raug tsim?
2024 Tus sau: Fiona Howard | [email protected]. Kawg hloov kho: 2024-01-10 06:38
Ib qho kev sib xyaw ua ke muaj ob qhov rov ua dua los ntawm ob qhov sib txawv transposons txav ua ke ua ib chav thiab nqa DNA ntawm lawv (Fig. 25.10). Piv txwv li, xav txog ib ntu ntawm DNA flanked ntawm ob qhov kawg los ntawm ob qhov sib npaug sib npaug.
Kev sib xyaw ua ke ua haujlwm li cas?
Ib qho kev sib txuas lus sib txuas yog ib qho kev sib txuas ntawm cov caj ces muaj xws li ob qhov kev sib txuas (ISs) flanking ib ntu ntawm cov khoom thauj DNA feem ntau muaj cov tshuaj tua kab mob (AR) genes … Qhov no tuaj yeem siv tau txhawm rau txheeb xyuas cov noob AR cuam tshuam nrog ntau yam ntawm cov noob caj noob ces ntawm cov metagenomes.
Dab tsi yog qhov sib txawv ntawm cov khoom sib xyaw thiab cov tsis sib xyaw ua ke?
Qhov sib txawv tseem ceeb ntawm cov khoom sib xyaw thiab cov tsis sib xyaw ua ke yog qhov cov khoom sib xyaw ua ke muaj ob qhov sib txuas sib txuasthaum tsis sib xyaw cov transposons tau rov ua dua rov ua dua es tsis txhob cuam tshuam cov lus sib dhos. … Lawv yog cov DNA sib lawv liag. Lawv tsiv mus rau qhov chaw tshiab ntawm genome.
Dab tsi yog qhov sib txawv ntawm qhov sib xyaw ua ke thiab kev hloov pauv yooj yim?
Composite transposons yog cov noob caj noob ces uas muaj ob qhov sib txuas (ISs) feem ntau flanking ib lossis ntau cov tshuaj tiv thaiv kab mobNtawm qhov tod tes, IS cov ntsiab lus yog ib hom kev hloov pauv yooj yim. lub caij uas muaj cov noob coding rau transposase enzyme rau catalyze transposition.
cov transposons tuaj qhov twg?
Transposons tau pom thawj zaug hauv pob kws (pob txha) thaum xyoo 1940 thiab '50s los ntawm Asmeskas kws tshawb fawb Barbara McClintock, nws txoj haujlwm yeej nws qhov khoom plig Nobel rau Physiology lossis Tshuaj hauv xyoo 1983. Txij li thaum McClintock qhov kev tshawb pom, peb hom kev hloov pauv tau raug txheeb xyuas.
Pom zoo:
Puas sn2 tsim cov kev sib xyaw ntawm haiv neeg?
Vim tias cov carbocation xav tias lub hom phiaj, kev tawm tsam los ntawm nucleophile tuaj yeem tshwm sim los ntawm ob sab ntawm lub dav hlau. Qhov no ua rau kev tsim ntawm sib tov ntawm enantiomers, hu ua kev sib xyaw ntawm haiv neeg. Qhov no yog qhov sib piv rau SN2 uas tsuas yog tsim cov stereoisomer inverted ntawm cov reactant .
Thaum twg yog qhov sib xyaw sib txuas?
Kev Sib Tw Sib Tw Sib Tw ntawm Tokyo 2020 yuav muaj nyob rau ntawm 07:30 lub sijhawm hauv zos, 31 Lub Xya Hli 2021. Pab Pawg Triathlon Mixed Relay qhia txog kev sib tw ntawm nws qhov kev zoo siab tshaj plaws, nrog rau tus kheej kev ua si sib txuas nrog cov neeg dawb huv .
Puas cov sib xyaw ua ke sib txawv ntawm cov khoom?
Ib qho sib xyaw ua ke yog kev sib xyaw ntawm ob lossis ntau yam tshuaj lom neeg (cov ntsiab lus lossis cov khoom sib txuas), qhov twg cov khoom sib txawv tuaj yeem pom qhov txawv thiab yooj yim sib cais los ntawm lub cev txhais tau tias . Puas yog cov ntsiab lus sib txawv?
Yog ntsev yog ib qho khoom xyaw lossis sib xyaw?
S alt is lwm compound. Nws cov qauv tshuaj yog NaCl, uas sawv cev rau sodium chloride . Yog ntsev yog ib qho khoom lossis cov khoom sib xyaw? Tshuaj, cov ntsev ntsev muaj ob lub ntsiab lus, sodium (Na) thiab chloride (Cl). Tsis yog lub ntsiab lus tshwm sim sib cais thiab dawb hauv cov xwm txheej, tab sis pom muaj khi ua ke raws li compound sodium chloride .
Cov neeg raug tsim txom puas pab txhawb lawv cov neeg raug tsim txom?
Mendelsohn's Typology of Crime Victims Tsis koom tes nrog lawv cov neeg raug tsim txomtab sis pab txhawb rau nws hauv qee qhov me me, xws li nquag muaj kev ua txhaum cai loj . Cov neeg raug tsim txom puas pab txhawb rau lawv tus kheej raug tsim txom?
