Nucleus vs Nucleoid
Nyob rau hauv txhua lub cell nyob, muaj ib cheeb tsam uas tswj cov cell functions thiab qub txeeg qub teg. Rau eukaryotes, nws yog hu ua "Nucleus" thaum, rau prokaryotes, nws yog hu ua "Nucleoid". Ob leeg nucleus los yog nucleoid, ob leeg muaj cov ntaub ntawv genetic ntaub ntawv uas yog encoded nyob rau hauv cov khoom siv noob caj noob ces. Feem ntau cov khoom siv caj ces yog DNA hauv ob qho tib si. Txawm hais tias txoj haujlwm ntawm ob qho no yuav luag zoo sib xws, lawv cov qauv thiab lub koom haum tuaj yeem sib txawv ntawm ntau txoj hauv kev.
Nucleus
Nucleus yog lub cellular loj tshaj plaws thiab tseem ceeb tshaj plaws hauv lub cell eukaryotic. Feem ntau nws yog spherical los yog oval nyob rau hauv cov duab thiab muab tso rau hauv nruab nrab ntawm lub cell. Nucleus feem ntau muaj cov ntaub so ntswg, nucleoplasm, cov khoom siv chromatin, thiab cov nucleolus. Eukaryotic hlwb muaj ob txheej txheej nuclear uas cais cov nucleus los ntawm cytoplasm. Lub qhov hws ntawm nuclear tso cai rau kev hloov ntawm cov khoom siv nuclear los ntawm nucleus mus rau cytoplasm. Nucleoplasm yog granular ntom kua. Chromatin thiab nucleolus raug tshem tawm hauv cov kua dej homogenous no. Chromatin feem ntau muaj ntev, coiled DNA strands uas yog qhov tseem ceeb hauv kev xa cov ntaub ntawv caj ces ntawm ib tiam mus rau lwm tus. Nucleolus yog ib tug kheej kheej kheej kheej nyob rau hauv lub nucleus, ua los ntawm RNA thiab cov proteins. Lub nucleus tswj hwm tag nrho cov kev cuam tshuam metabolic ntawm lub cell thiab tswj lub voj voog ntawm tes thaum txhawb nqa cov khoom siv caj ces los ntawm ib tiam mus rau lwm tus.
Nucleoid
Nucleoid feem ntau pom hauv Prokaryotes xws li kab mob thiab xiav-ntsuab algae. Nws yog ib cheeb tsam uas tsis tau txhais hais tias muaj cov nucleic acids xwb. Feem ntau nws muaj tib lub voj voog chromosome, uas khaws cov ntaub ntawv caj ces ntawm prokaryotes. Tsis muaj daim nyias nyias nyias thiab lwm thaj chaw muaj kev sib koom ua ke hauv cov nucleoid thaum piv rau cov nucleus. Vim tsis muaj ib puag ncig daim nyias nyias, qhov no tsis yog cais los ntawm cov seem ntawm cov prokaryotic cytoplasm.
Qhov txawv ntawm Nucleus thiab Nucleoid yog dab tsi?
• Nucleus yog tus qauv uas Eukaryotes khaws lawv cov khoom caj ces thaum nucleoid yog qhov chaw uas Prokaryotes khaws lawv cov khoom siv caj ces.
• Nucleus loj thiab zoo, hos nucleoid me me thiab tsis zoo.
• Nucleus nyob ib puag ncig los ntawm ob txheej txheej hu ua "nuclear membrane" thiab cais los ntawm lwm cov cell organelles. Xws li daim nyias nyias tsis tuaj yeem pom hauv nucleoid.
• Nucleus muaj ntau chromosomes thaum nucleoid feem ntau tsuas muaj ib ncig DNA molecule.
• Nucleolus thiab nucloeplasm muaj nyob rau hauv lub nucleus, whereas lawv tsis nyob rau hauv nucleiod.
