Which of the following processes occurs in prokaryotes but not in eukaryotes?
A) post-transcriptional splicing
B) transcription and translation occur simultaneously
C) translation in the absence of a ribosome
D) gene splicing

Question

Quizplus · Accepted Answer

In prokaryotes, transcription and translation occur simultaneously because they lack a nuclear envelope, allowing for the ribosome to attach directly to the mRNA as it is being transcribed. In eukaryotes, transcription and translation occur in different compartments, the nucleus and cytoplasm respectively, with the mRNA undergoing post-transcriptional modifications before leaving the nucleus to be translated. 
However, post-transcriptional splicing and gene splicing occur in eukaryotes, but not in prokaryotes. In eukaryotes, some regions of the pre-mRNA molecule, called introns, are removed through splicing, leaving only the exons which are then spliced together to form the final mRNA molecule. Prokaryotic mRNA does not undergo splicing, as their genes are typically shorter, without introns. 
Translation requires a ribosome in both prokaryotes and eukaryotes; translation in the absence of a ribosome does not occur in either.

Which of the Following Processes Occurs in Prokaryotes but Not