Why is it that bacterial ribosomes can begin translation before mRNA synthesis is completed, but eukaryotic ribosomes cannot? See Section 17.3 Prokaryotic mRNAs are synthesized with ribosomes attached. Prokaryotic mRNAs are elongated differently from eukaryotic mRNAs. mRNA splicing occurs very quickly in prokaryotic cells. In prokaryotes, transcription and translation take place in the cytoplasm. Solution In prokaryotic the transcription and translation take place in cytoplasm Note- whereas in eukaryotic translation and transcription occur in seprate compartments, transcription occur in nucleus whereas translation occur outside nucleus in cytoplasm with ribosome involved, RNA is processed n nuclueus itself but in prokaryotics processing Is done in nucleus..