Which of the Following is Observed in Prokaryotes but Not

Question

Which of the following is observed in prokaryotes but not in eukaryotes?
A)UGG is an example of a stop codon only found in prokaryotes.
B)An mRNA can be translated by only one ribosome at a time in prokaryotes.
C)The 5' end of a prokaryotic mRNA can be translated while the 3'end is still being transcribed.
D)Translation does not require any protein factors in prokaryotes.
E)In prokaryotes, ribosomes move along an mRNA in the 3' to 5' direction.

Accepted Answer

In prokaryotes, transcription and translation can occur simultaneously since there is no nuclear membrane separating the two processes. As a result, the 5' end of a prokaryotic mRNA can be translated by ribosomes while the 3' end is still being transcribed by RNA polymerase. This phenomenon is not observed in eukaryotes, where transcription and translation are spatially separated in the nucleus and cytoplasm, respectively.