Which step in translation initiation is unique to eukaryotes?

Question

Quizplus · Accepted Answer

Scanning is unique to eukaryotic translation initiation, as the 5' cap structure of the mRNA must be recognized by the scanning complex before the start codon can be located. In prokaryotes, initiation typically occurs at a specific Shine-Dalgarno sequence within the mRNA, which is recognized directly by the ribosome. The other steps listed (formation of the preinitiation complex, formation of the initiation complex, ribosome assembly, and translocation) occur in both eukaryotic and prokaryotic translation initiation.

Which Step in Translation Initiation Is Unique to Eukaryotes