Video: Puas yog cov cell prokaryotic muaj mRNA?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Txij li thaum prokaryotic DNA yog tsis cais tawm ntawm lub cytoplasm los ntawm ib tug nuclear membrane, txhais lus pib rau mRNA molecules ua ntej transcription yog ua tiav. Yog li ntawd, transcription thiab translation yog ua ke prokaryotes . Prokaryotic mRNAs yog polygenic, ua tsis yog muaj intros los yog exons, thiab yog luv luv nyob rau hauv cell.
Tsis tas li ntawd, mRNA nyob qhov twg hauv prokaryotes?
Hauv ib prokaryotic cell, transcription thiab translation yog ua ke; uas yog, translation pib thaum lub mRNA tseem yog synthesized. Hauv eukaryotic cell, transcription tshwm sim hauv lub nucleus, thiab kev txhais lus tshwm sim hauv cytoplasm.
Tsis tas li ntawd, qhov twg txhais lus tshwm sim hauv prokaryotes? Prokaryotic kev sau ntawv tshwm sim nyob rau hauv lub cytoplasm ua ke txhais lus . Prokaryotic transcription thiab txhais lus ua tau tshwm sim ib txhij. Qhov no yog tsis yooj yim sua nyob rau hauv eukaryotes, qhov twg transcription tshwm sim nyob rau hauv lub membrane-bound nucleus thaum kev txhais lus tshwm sim sab nraum lub nucleus hauv cytoplasm.
Kuj Paub, qhov txawv ntawm prokaryotic thiab eukaryotic mRNA yog dab tsi?
Lub ntsiab Qhov sib txawv ntawm prokaryotic thiab eukaryotic mRNA yog tias prokaryotic mRNA yog polycistronic, hos eukaryotic mRNA kab mob yog monocistronic. Tsis tas li ntawd, ob peb lub noob caj noob ces ntawm ib qho operon tau sau rau hauv ib leeg mRNA thaum eukaryotic mRNA kab mob muaj ib tug gene transcribed rau hauv ib tug mRNA molecule.
Cov kab mob puas muaj mRNA?
Cov kab mob muaj ib qho lus teb nthuav. Hauv kab mob , mRNA tau muab txhais ua cov protein sai li sai tau thaum nws tau sau tseg. Tsis zoo li eukaryotic hlwb, kab mob ua tsis yog muaj ib tug txawv nucleus uas cais DNA los ntawm ribosomes, yog li tsis muaj teeb meem rau tam sim ntawd txhais.
Pom zoo:
Puas yog eukaryotic hlwb puas muaj cov cell membrane?
Zoo li prokaryotic cell, eukaryotic cell muaj plasma membrane, cytoplasm, thiab ribosomes. Txawm li cas los xij, tsis zoo li cov hlwb prokaryotic, cov hlwb eukaryotic muaj: cov membrane-bound nucleus. Muaj ntau cov kab mob uas muaj kab mob (xws li endoplasmic reticulum, Golgi apparatus, chloroplasts, thiab mitochondria)
Puas yog prokaryotic cell muaj cytoplasm?
Cov hlwb ntawm tag nrho cov prokaryotes thiab eukaryotes muaj ob yam yooj yim: lub plasma membrane, kuj hu ua cell membrane, thiab cytoplasm. Prokaryotic hlwb tsis muaj lub cev hauv lub cev (organelles), thaum lub hlwb eukaryotic muaj lawv. Piv txwv ntawm prokaryotes yog cov kab mob thiab archaea
Puas yog mitochondria yog prokaryotic cell?
Prokaryotic cells yog cov qauv qis dua li cov hlwb eukaryotic. Lawv tsis muaj nucleus; Hloov chaw lawv cov khoom siv caj ces yog dawb-floating nyob rau hauv lub cell. Lawv kuj tsis muaj ntau cov kab mob hauv cov kab mob uas muaj nyob hauv eukaryotic hlwb. Yog li, prokaryotes tsis muaj mitochondria
Puas yog prokaryotic mRNA muaj lub hau thiab tus Tsov tus tw?
"Lub 5 'cap tiv thaiv mRNA nascent los ntawm kev degradation thiab pab nyob rau hauv ribosome khi thaum lub sij hawm txhais lus. Ib tug poly (A) tail yog ntxiv rau 3' kawg ntawm pre-mRNA ib zaug elongation tiav. Tab sis ua li cas txog Prokaryotic mRNA?
Dab tsi yog qhov txawv ntawm cov hlwb prokaryotic thiab prokaryotic?
Prokaryotes yog cov kab mob uas tsim los ntawm cov hlwb uas tsis muaj cell nucleus los yog ib qho membrane-encased organelles. Eukaryotes yog cov kab mob uas tsim los ntawm cov hlwb uas muaj cov membrane-bound nucleus uas tuav cov khoom siv noob caj noob ces nrog rau cov kab mob membrane-bound organelles