Puas yog cov cell prokaryotic muaj mRNA?
Puas yog cov cell prokaryotic muaj mRNA?

Video: Puas yog cov cell prokaryotic muaj mRNA?

Video: Puas yog cov cell prokaryotic muaj mRNA?
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Anonim

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.

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