[Campbell Biology P.404] What is the key difference in how transcription and translation are... | Practice Question
What is the key difference in how transcription and translation are coordinated between bacterial and eukaryotic cells?
A: In bacteria, transcription and translation are spatially and temporally separated, while in eukaryotes, they occur simultaneously in the cytoplasm.
B: Bacteria exhibit coupled transcription and translation because they lack a nuclear envelope, while eukaryotes separate these processes due to their nuclear compartmentalization.
C: Eukaryotes perform extensive RNA processing before translation, whereas bacteria directly translate raw mRNA, with no significant differences in coordination.
D: Both bacterial and eukaryotic cells universally separate transcription in the nucleus from translation in the cytoplasm for better regulation.
Explanation
The absence of a nuclear envelope in bacteria allows transcription and translation to occur simultaneously and in the same cellular compartment, a process known as coupled transcription-translation. In contrast, eukaryotic cells possess a nuclear envelope that spatially separates transcription in the nucleus from translation in the cytoplasm , allowing for extensive RNA processing between the two steps.