Question

Match the following RNA polymerase with their transcribed product:

Select the correct option from the following:

• A. A - I, B - III, C - II
• B. A - I, B - II, C - III
• C. A - II, B - III, C - I
• D. A - III, B - II, C - I

Hint:

Mnemonic: {RMT} (1, 2, 3)

• Pol {1} $\rightarrow$ {R}ibosomal RNA (rRNA).
• Pol {2} $\rightarrow$ {M}essenger RNA (mRNA/hnRNA).
• Pol {3} $\rightarrow$ {T}ransfer RNA (tRNA).

Answer 1

The Correct Option is C

Step 1: Functions of Eukaryotic RNA Polymerases:
In eukaryotes, there are three distinct RNA polymerases in the nucleus with specific functions:

• RNA Polymerase I: Transcribes rRNAs (28S, 18S, and 5.8S). So, A matches with II.
• RNA Polymerase II: Transcribes precursor of mRNA (hnRNA). So, B matches with III.
• RNA Polymerase III: Transcribes tRNA, 5S rRNA, and snRNAs. So, C matches with I.

Step 2: Matching with Options:
The sequence is A-II, B-III, C-I. This corresponds to Option (C).