Cov txheej txheem:
Video: Avery thiab nws pab pawg tau txiav txim siab li cas molecule tseem ceeb tshaj plaws rau kev hloov pauv?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Qhia luv luv li cas Avery thiab nws pab pawg tau txiav txim siab qhov twg molecule yog qhov tseem ceeb tshaj plaws rau kev hloov pauv . Avery thiab nws pab pawg siv ob lub enzymes sib txawv ntawm ib qho extract ntawm cov kab mob kub-tua. Ib tug puas DNA, tus lwm yam rhuav tshem txhua yam tab sis. Lawv pom qhov ntawd kev hloov pauv tseem tshwm sim thaum muaj DNA.
Yog li ntawd, dab tsi yog qhov xaus ntawm Avery qhov kev sim?
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.
Avery thiab nws pab pawg tau txheeb xyuas txoj hauv kev hloov pauv li cas? Oswald Avery , Colin MacLeod, thiab Maclyn McCarty tau pom tias DNA (tsis yog proteins) tuaj yeem ua tau hloov cov khoom ntawm cov hlwb, qhia meej txog cov tshuaj lom neeg ntawm cov noob. Avery , MacLeod thiab McCarty txheeb xyuas DNA raws li " hloov txoj cai "thaum kawm Streptococcus pneumoniae, cov kab mob uas tuaj yeem ua rau mob ntsws.
Ntawm no, Frederick Griffith xav kawm dab tsi txog cov kab mob?
Kub tua kab mob ua rau kab mob thiab nyob tsis muaj mob kab mob tua nas txhaj cais. Kab mob ua rau kab mob thiab tsis muaj mob kab mob ua ke nrog cua sov tua kab mob -- tua nas.
Peb lub luag haujlwm tseem ceeb ntawm DNA yog dab tsi?
Plaub lub luag hauj lwm DNA plays yog replication, encoding information, mutation/recombination and gene expression
- Rov ua dua. DNA muaj nyob rau hauv ib tug ob-helical kev npaj, nyob rau hauv uas txhua lub hauv paus nyob rau hauv ib tug strand khi rau ib tug complementary puag ntawm lwm strand.
- Cov ntaub ntawv encoding.
- Mutation thiab Recombination.
- Gene Expression.
Pom zoo:
Vim li cas tom qab kev hloov pauv kev hloov pauv tseem ceeb?
Kev hloov pauv tom qab kev txhais lus (PTMs) xws li glycosylation thiab phosphorylation ua lub luag haujlwm tseem ceeb ntawm kev ua haujlwm ntawm hemostatic proteins thiab tseem ceeb heev hauv kev teeb tsa kab mob. Xws li theem nrab hloov pauv rau cov proteins hemostatic muaj ntau yam cuam tshuam rau lawv lub peev xwm los cuam tshuam nrog lwm cov proteins
Dab tsi tsim cov roj siab thiab nws hloov pauv li cas nrog kev hloov pauv hauv kinetic zog?
Gas siab yog tshwm sim los ntawm kev sib tsoo ntawm cov khoom siv roj nrog rau sab hauv ntawm lub thawv thaum lawv sib tsoo nrog thiab tawm dag zog rau ntawm phab ntsa ntim. Tom qab ntawd cov roj yog cua sov. Raws li qhov kub ntawm cov roj nce, cov khoom tau nce lub zog kinetic thiab lawv cov nrawm nrawm
Dab tsi feem ntau yog pab pawg ua haujlwm thiab vim li cas cov pab pawg no tseem ceeb?
Cov pab pawg ua haujlwm tau txuas mus rau carbonbackbone ntawm cov organic molecules. Lawv txiav txim siab tus yam ntxwv thiab tshuaj lom neeg reactivity ntawm molecules. Cov pab pawg ua haujlwm tsis tshua muaj kev ruaj ntseg dua li cov pa roj carbon monoxide thiab zoo li yuav koom nrog cov tshuaj tiv thaiv
Vim li cas nws tseem ceeb heev uas yuav tsum xav txog ntau yam thaum txiav txim siab cov hauv paus hniav ntawm cov kab zauv polynomial?
Piv txwv li, tus naj npawb ntawm lub sij hawm ib tug muab polynomial sib npaug muaj ib lub hauv paus ntawm ib tug muab point yog lub multiplicity ntawm lub hauv paus. Qhov kev xav ntawm ntau qhov tseem ceeb yog qhov tseem ceeb kom suav tau kom raug yam tsis muaj kev qhia tshwj xeeb (piv txwv li, ob lub hauv paus suav ob zaug). Li no cov lus qhia, ' suav nrog ntau ntau'
Dab tsi ua haujlwm pab pawg tseem ceeb tshaj plaws rau lub zog ntawm tes?
Nrog plaub lub electronegative oxygen atoms, phosphate pawg yog cov reactive heev, thiab kev hloov ntawm ib pab pawg phosphate los ntawm ib tug molecule mus rau lwm tus muab lub zog rau cov tshuaj tiv thaiv. ATP, lub luag haujlwm tseem ceeb hauv lub hlwb, yog tsim los ntawm peb pawg phosphate sib koom ua ke