How have eukaryotic cells evolved? What are some examples of eukaryotic cells? What are eukaryotic cells? Why do prokaryotic cells have no nucleus? How does dna differ in eukaryotic and prokaryotic cells? This is called coupled transcription - translation. In eukaryotes, most of the gene have introns or non coding sequences along with exons or coding sequences.
The exons are joined together and introns are removed during mRNA processing. Prokaryotes do not have introns Except Archaebacteria. Therefore mRNA processing is not required. In prokaryotes splicing of mRNA transcript does not occur. No poly A tail is added to bacterial mRNA. The shape of the protein is determined through the different types of amino acids in the chain, which were attached to tRNA molecules, but tRNA are specific to the mRNA sequence.
Hence, it is clear that the protein molecules depict the information stored in the DNA molecule. However, protein synthesis could be initiated from an RNA strand, as well. However, mRNA can associate with the ribosomes after the strand is moved out of the nucleus in eukaryotes.
In other words, RNA processing does not take place in prokaryotic synthesis, but it does in the eukaryotic process. Our website uses cookies to improve your experience. Learn more. Facebook Twitter. Anonymous 27 November at Anonymous 30 November at Anonymous 2 December at Anonymous 4 December at Anonymous 5 December at Anonymous 6 December at Anonymous 7 December at
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