Video: Cov kws tshawb fawb xav tias tus kab mob no los qhov twg los?
2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
Keeb kwm dab neeg
Ib txoj kev xav hypothesizes qhov ntawd kab mob sawv los ntawm DNA puag ncig (tseem hu ua plasmid) uas tau replicate nws tus kheej thiab txav ntawm cov hlwb, hloov cov ntaub ntawv caj ces ntawm ib lub cev mus rau lwm tus.
Tsis tas li ntawd, tus kab mob no pib li cas?
Kab mob tuaj yeem kis tau txhua hom kev ua neej, los ntawm tsiaj thiab nroj tsuag mus rau cov kab mob me me, suav nrog cov kab mob thiab cov khoom qub. Keeb kwm ntawm kab mob hauv keeb kwm kev hloov pauv ntawm lub neej tsis paub meej: qee qhov tuaj yeem hloov pauv los ntawm plasmids-daim ntawm DNA uas tuaj yeem txav mus los ntawm cov cell-thaum lwm tus tuaj yeem hloov pauv los ntawm cov kab mob.
Kuj Paub, peb lub hauv paus pib ntawm tus kab mob yog dab tsi? Peb cov kev xav tseem ceeb tau hais txog: 1. Qhov kev vam meej, lossis kev khiav tawm, qhov kev xav tau hais tias kab mob sawv los ntawm cov khoom sib txuas uas tau txais lub peev xwm txav ntawm cov cell; 2. qhov tsis txaus siab, lossis txo qis, qhov kev xav pom zoo tias kab mob yog cov seem ntawm cov kab mob cellular; thiab 3.
Ib yam li ntawd, koj tuaj yeem nug, thaum twg cov kab mob tshwm sim thawj zaug hauv ntiaj teb?
Ib kauj ruam tseem ceeb hauv kev kab mob vais lav evolutionary taug kev zoo li tau tuaj txog ib ncig ntawm 1.5 billion xyoo dhau los - uas yog lub hnub nyoog uas pab pawg kwv yees 66 kab mob vais lav -specific protein quav quav tuaj rau ntawm qhov chaw. Cov kev hloov no yog rau cov proteins hauv cov kab mob vais lav 'txheej tsho - cov tshuab kab mob siv los rhuav rau hauv cov tswv tsev.
Leej twg yog thawj tus neeg tshawb pom tus kab mob?
Xyoo 1892, Dmitry Ivanovsky siv ib qho ntawm cov ntxaij lim dej no los qhia tias kua ntoo los ntawm cov nroj luam yeeb muaj kab mob tseem kis tau mus rau cov nroj tsuag haus luam yeeb noj qab nyob zoo txawm tias tau lim dej los. Martinus Beijerinck hu ua cov ntawv lim dej, kis tau tus kab mob "kab mob" thiab qhov kev tshawb pom no tau suav tias yog qhov pib ntawm virology.
Pom zoo:
Vim li cas cov kws tshawb fawb tshawb fawb txog kab mob?
Cov kab mob tsis yog tsuas yog muaj ntau, ntau yam, thiab tseem ceeb rau kev nyab xeeb, lawv ua lub luag haujlwm tseem ceeb hauv kev hloov pauv ntawm lawv cov tswv. Ntxiv rau qhov xaiv qhov siab uas lawv ua rau cov pej xeem ntawm tes, raws li tau hais los saum no, lawv txhawb kev hloov pauv ntawm cov noob thiab cov genomes thiab sib sau cov noob nyob thoob plaws ib leeg
Vim li cas cov kws tshawb fawb ntxig cov noob rau tib neeg cov insulin rau hauv cov kab mob?
Recombinant DNA yog cov kws tshawb fawb thev naus laus zis tsim los uas ua rau nws muaj peev xwm ntxig tib neeg cov noob mus rau hauv cov khoom siv ntawm cov kab mob sib kis. Qhov "recombinant" micro-organism tam sim no tuaj yeem tsim cov protein nkag los ntawm tib neeg cov noob. Cov kws tshawb fawb tsim tib neeg cov insulin insulin hauv chav kuaj
Dab tsi yog kev tshawb fawb kws tshawb fawb txog keeb kwm keeb kwm los kwv yees lub sijhawm tuag piav qhia vim li cas kev kwv yees tsis tas yuav ncaj?
Ib tus kws tshawb fawb kws tshawb fawb txog keeb kwm tshawb fawb kev txhim kho kab ntawm kab hauv lub cev los kwv yees lub sijhawm tuag. Cov kev txiav txim siab no tsis yog qhov yooj yim ib txwm vim tias tus nqi ntawm cov kab menyuam loj hlob tau cuam tshuam los ntawm ib puag ncig cuam tshuam xws li thaj chaw nyob, huab cua, thiab huab cua puag ncig
Thaum tus kws kho mob tau tso cai tso cai ntau npaum li cas yuav tsum muaj kev sib ntsib tim ntsej tim muag tshwm sim ntawm tus kws kho mob thiab cov kws kho mob qib siab uas tau sau npe rau tus nais maum?
Txawm li cas los xij, yog tias APRN lossis PA tau nyob hauv daim ntawv pom zoo tso cai nrog kws saib xyuas kws kho mob tsawg kawg tsib ntawm xya xyoo dhau los, cov rooj sib tham tim ntsej tim muag yuav tsum tshwm sim tsawg kawg ib hlis txog rau thawj hnub ntawm hnub uas tau pom zoo kos npe
Cov kab mob dab tsi ua rau cov kws kho mob tshawb fawb?
Molecular pathology feem ntau siv hauv kev kuaj mob qog noj ntshav thiab kab mob sib kis. Molecular Pathology feem ntau yog siv los tshuaj xyuas cov qog nqaij hlav xws li melanoma, brainstem glioma, qog hlwb thiab ntau lwm hom qog noj ntshav thiab kab mob sib kis