Question

question 101
1.5 pts
which of the following statements correctly compares transcription in prokaryotes and eukaryotes?

prokaryotes have at least three types of rna polymerases, whereas eukaryotes only have one.

bacteria have one type of rna polymerase, whereas eukaryotes have at least three.

rna polymerase in both prokaryotes and eukaryotes produce the same rna molecules.

both eukaryotes and prokaryotes recognize a polyadenylation signal in order to terminate transcription.

Explanation:

• Analyze each option:
• Option 1: Prokaryotes (like bacteria) have one type of RNA polymerase, eukaryotes have at least three (RNA pol I, II, III). So this option is incorrect.
• Option 2: Bacteria (prokaryotes) have one RNA polymerase, eukaryotes have at least three (for different RNA types: rRNA, mRNA, tRNA etc.). This matches the known facts about transcription in prokaryotes and eukaryotes.
• Option 3: Prokaryotic and eukaryotic RNA polymerases produce different RNA molecules (e.g., eukaryotes have more complex processing and different RNA types synthesized). So this is incorrect.
• Option 4: Polyadenylation signal for termination is mainly a eukaryotic (especially for mRNA) feature, prokaryotes have different termination mechanisms. So this is incorrect.

Answer:

Bacteria have one type of RNA polymerase, whereas eukaryotes have at least three.