Question:
Which of the following statements are correct about RNA polymerases:
A. RNA polymerase I transcribes all ribosomal rRNAs genes.
B. RNA polymerase I and III together transcribe all ribosomal rRNAs genes.
C. RNA polymerase III transcribes genes for tRNAs.
D. RNA polymerase III also transcribes microRNAs (miRNAs) and long noncoding RNAs (lncRNAs).
Which of the following statements are correct about RNA polymerases:
A. RNA polymerase I transcribes all ribosomal rRNAs genes.
B. RNA polymerase I and III together transcribe all ribosomal rRNAs genes.
C. RNA polymerase III transcribes genes for tRNAs.
D. RNA polymerase III also transcribes microRNAs (miRNAs) and long noncoding RNAs (lncRNAs).
B. RNA polymerase I and III together transcribe all ribosomal rRNAs genes.
C. RNA polymerase III transcribes genes for tRNAs.
D. RNA polymerase III also transcribes microRNAs (miRNAs) and long noncoding RNAs (lncRNAs).
Show Hint
RNA Pol I, II, III = rRNA, mRNA, tRNA. Note that 5S rRNA is the odd one out in Pol III.
Updated On: May 28, 2026
- A, C and D Only
- B and C Only
- B, C and D Only
- A and C Only
Show Solution
Verified By Collegedunia
The Correct Option is B
Solution and Explanation
Step 1--3: Analysis
Statement A is false: Pol I transcribes 5.8S, 18S, and 28S rRNAs, but Pol III transcribes 5S rRNA. So statement B is true (together they handle all rRNAs). Statement C is true. Statement D is false: Pol II is primarily responsible for miRNAs and lncRNAs.
Step 4: Conclusion
B and C are correct.
Final Answer: (B)
Statement A is false: Pol I transcribes 5.8S, 18S, and 28S rRNAs, but Pol III transcribes 5S rRNA. So statement B is true (together they handle all rRNAs). Statement C is true. Statement D is false: Pol II is primarily responsible for miRNAs and lncRNAs.
Step 4: Conclusion
B and C are correct.
Final Answer: (B)
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