Video: Transformed cell yog dab tsi?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Hauv molecular biology, kev hloov pauv yog genetic alteration ntawm a cell tshwm sim los ntawm qhov ncaj uptake thiab koom ua ke ntawm exogenous genetic khoom los ntawm nws ib puag ncig los ntawm lub cell membrane(s).
Ib yam li ntawd ib tug yuav nug, dab tsi yog ib tug hloov cell kab?
A hloov cell kab yog a kab ntawm tes uas tau txais kev loj hlob infinite tom qab ntxig cov kab mob gene Cheebtsam rau hauv cell cov genome. Hloov kab ntawm tes nyiam tswj cov yam ntxwv ruaj khov nyob rau lub sijhawm. Txawm li cas los xij, cov lus qhia (tsis yog hloov ) kab ntawm tes feem ntau qhia cov kev hloov phenotypic tseem ceeb tshaj cov nqe lus.
Vim li cas cov hlwb hloov pauv hu ua tsis txawj tuag? Ib txwm hlwb muaj finite proliferative muaj peev xwm nyob rau hauv kab lis kev cai. Piv txwv li, hlwb muab tau los ntawm cov qog immortalized los ntawm cov tshuaj carcinogens los yog cov kab mob muaj peev xwm faib indefinitely.
Ntawm no, yuav ua li cas tshwm sim hauv cell transformation?
a cell siv DNA los ntawm sab nraud cell tom qab ntawd cov DNA sab nraud dhau los ua ib feem ntawm cov cell cov DNA. Thaum cov DNA recombinant tau muab tso rau hauv ib qho ntawm cov chromosomes cell.
Dab tsi yog cov hlwb tsis hloov pauv?
Tsis yog - hloov hlwb (cov vaj huam sib luag A thiab B) xav tau qhov chaw loj hlob thiab muaj kev tiv thaiv kev tiv thaiv kom tsis txhob muaj neeg coob coob. Ntawm qhov tsis sib xws, hloov hlwb (vaj huam sib luag C) tsis tas yuav muaj qhov loj me, thiab tsim cov cheeb tsam loj uas hu ua foci.
Pom zoo:
Dab tsi yog qhov txawv ntawm tsiaj cell thiab cog cell?
Qhov sib txawv ntawm cov nroj tsuag thiab cov tsiaj hlwb yog tias cov tsiaj txhu feem ntau yog puag ncig thaum cov nroj tsuag feem ntau yog cov duab plaub. Cov nroj tsuag muaj cov phab ntsa tawv tawv uas nyob ib puag ncig cov cell membrane. Tsiaj cell tsis muaj phab ntsa ntawm tes
Ob qhov tseem ceeb ntawm lub voj voog ntawm tes yog dab tsi thiab dab tsi tshwm sim rau lub cell hauv txhua theem?
Muaj ob theem tseem ceeb hauv lub voj voog ntawm tes. Thawj theem yog interphase thaum lub cell loj hlob thiab replicates nws DNA. Qhov thib ob yog theem mitotic (M-Phase) thaum lub sijhawm cell faib thiab hloov ib daim qauv ntawm nws cov DNA mus rau ob lub hlwb zoo tib yam
Dab tsi yog 2 qhov tseem ceeb ntawm lub voj voog ntawm tes thiab dab tsi tshwm sim rau lub cell hauv txhua theem?
Cov xwm txheej no tuaj yeem muab faib ua ob qhov tseem ceeb: interphase (hauv nruab nrab ntawm kev sib faib theem ua pawg G1 theem, S theem, G2 theem), thaum lub xov tooj ntawm tes tsim thiab ua nrog nws cov haujlwm metabolic; mitotic theem (M mitosis), thaum lub sij hawm lub cell yog replicating nws tus kheej
Lub ntsiab lus ntawm cog cell thiab tsiaj cell yog dab tsi?
Tsiaj Thiab Nroj Tsuag Cell. Txhua yam muaj sia nyob, nroj tsuag lossis tsiaj txhu yog tsim los ntawm cov hlwb. Lub cytoplasm nyob rau hauv ib lub cell muaj chloroplast thiab lwm yam plastids, mitochondria, dictyosomes, ribosomes, du thiab ntxhib endoplasmic reticulum, nucleus thiab lwm yam. Ib tug tsiaj cell yog ntau dua los yog tsawg spherical
Dab tsi yog cell membrane hauv prokaryotic cell?
Prokaryotes thiab eukaryotes yog ob hom cell uas muaj nyob. Tab sis, prokaryotes muaj qee cov organelles nrog rau cov cell membrane, kuj hu ua phospholipid bilayer. Cov cell membrane no kaw lub cell thiab tiv thaiv nws, tso cai rau hauv qee cov molecules raws li qhov xav tau ntawm tes