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A Level Biology Question (Protein Synthesis)

In prokaryotic cells, transcription results directly in the production of mRNA from DNA. In eukaryotic cells, transcription results in the production of pre-mRNA. This means that in eukaryotic cells the pre-mRNA has to be spliced in order to form mRNA.

I'm just wondering why this is the case. Why don't prokaryotes produce pre-mRNA? Why can't eukaryotes directly produce mRNA? What is the difference?

Thank you! I hope this isn't too confusing haah

ribosomes innit bruv

Well I know prokaryotes don't have introns in their dna so there's no need for splicing of 'pre-mRNA' I suppose. So You should probably just google it to be sure though

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Reply 3

etudixnt

Original post by VokeA

Well I know prokaryotes don't have introns in their dna so there's no need for splicing of 'pre-mRNA' I suppose. So You should probably just google it to be sure though

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Ohh okay, the introns are the sections of DNA that don't code for proteins right? So the corresponding 'useless' base sequences in the mRNA would prevent the full synthesis of a polypeptide in a eukaryotic cell... and therefore they need to be removed?

Does that seem right? Thank you so much!