Lub neej cov ntaub ntawv nthuav tawm cov qauv cellular yooj yim tshaj plaws yog prokaryotes. Lwm hom cellular qauv yog eukaryotic.
hom cell twg muaj cov qauv yooj yim tshaj?
Txhua yam muaj sia tuaj yeem muab faib ua peb yam tseem ceeb: Kab mob, Archaea thiab Eukarya. Feem ntau cov kab mob ib leeg pom nyob rau hauv cov kab mob thiab Archaea domains yog hu ua prokaryotes. Cov kab mob no yog tsim los ntawm prokaryotic cells - cov hlwb me tshaj plaws, yooj yim tshaj plaws thiab feem ntau cov hlwb qub.
hom cell twg yog qhov yooj yim tshaj plaws ntawm cov cell?
Ib tug prokaryotic cell yog ib yam yooj yim, ib leeg-celled (unicellular) kab mob uas tsis muaj ib tug nucleus, los yog lwm yam membrane-bound organelle. Tsis ntev peb yuav los pom tias qhov no txawv txawv hauv eukaryotes. Prokaryotic DNA yog pom nyob rau hauv nruab nrab ntawm lub cell: ib tug darkened cheeb tsam hu ua lub nucleoid (Daim duab 1).
Lub xovtooj yooj yim hu ua dab tsi?
Prokaryotic Cells Cov hom cell yooj yim tshaj plaws yog thawj hom hlwb uas tsim nyob rau hauv lub ntiaj teb. Cov no hu ua prokaryotic cells.
DNA yooj yim tshaj yog dab tsi?
Nrog tsuas yog kwv yees li 160,000 lub hauv paus ntawm DNA, lub genome ntawm Carsonella ruddi [duab] tsawg dua li ib nrab ntawm qhov loj xav tias yog qhov tsawg kawg nkaus tsim nyog rau lub neej. "Nws yog qhov tsawg tshaj plaws genome, tsis yog los ntawm me ntsis tab sis los ntawm txoj kev ntev," Nancy Moran ntawm University of Arizona tau hais.
