Question

Which of the following statements are correct with reference to prokaryotic genome?

• A. Monocistronic structural genes
• B. Introns absent in structural genes
• C. Transcription and translation are coupled processes
• D. Primary transcript undergoes splicing

Hint:

Remember, in prokaryotes, transcription and translation are coupled, and there is only one RNA polymerase present, unlike in eukaryotes.

Answer 1

The Correct Option is D

• Monocistronic structural genes: Prokaryotic genome usually has polycistronic genes, not monocistronic genes. This is incorrect.
• Introns absent in structural genes: In prokaryotes, structural genes generally lack introns. This is correct.
• Transcription and translation are coupled processes: In prokaryotes, transcription and translation occur simultaneously because both processes occur in the cytoplasm. This is correct.
• Primary transcript undergoes splicing: Prokaryotes do not have splicing of the primary transcript, which is typical of eukaryotes. This is incorrect.
• Only one RNA polymerase is present: Prokaryotes have a single RNA polymerase for transcription. This is correct.

Conclusion: The correct statements are b, c, and e.