What is the difference between transcription in prokaryotes and eukaryotes?

What is the difference between transcription in prokaryotes and eukaryotes?

• A. Prokaryotes do not perform transcription.
• B. Eukaryotes translate mRNA in the nucleus.
• C. In prokaryotes, transcription and translation can be coupled in the cytoplasm; in eukaryotes, transcription occurs in the nucleus with RNA processing before translation.
• D. Prokaryotes must process RNA before translation.

Answer: (C)

The key idea here is how cellular organization shapes when transcription and translation happen. In prokaryotes there’s no nuclear boundary, so the mRNA being made can be read by ribosomes in the cytoplasm even while transcription is still in progress. This coupling means genes can be expressed very quickly, and a single mRNA can even carry instructions for several proteins. In eukaryotes, transcription occurs in the nucleus and the initial RNA transcript must be processed before it leaves the nucleus. This RNA processing includes adding a 5' cap, removing introns by splicing, and adding a poly-A tail. Only after maturation does the mRNA go to the cytoplasm for translation. This separation ensures that transcription and translation are temporally and spatially distinct, and the mRNA is typically ready for translation as a single genetic message per transcript. So, the difference is the coupling of transcription and translation in prokaryotes versus the separation with RNA processing and nuclear export in eukaryotes.

The key idea here is how cellular organization shapes when transcription and translation happen. In prokaryotes there’s no nuclear boundary, so the mRNA being made can be read by ribosomes in the cytoplasm even while transcription is still in progress. This coupling means genes can be expressed very quickly, and a single mRNA can even carry instructions for several proteins.

In eukaryotes, transcription occurs in the nucleus and the initial RNA transcript must be processed before it leaves the nucleus. This RNA processing includes adding a 5' cap, removing introns by splicing, and adding a poly-A tail. Only after maturation does the mRNA go to the cytoplasm for translation. This separation ensures that transcription and translation are temporally and spatially distinct, and the mRNA is typically ready for translation as a single genetic message per transcript.

So, the difference is the coupling of transcription and translation in prokaryotes versus the separation with RNA processing and nuclear export in eukaryotes.