AIIMS 2018 Botany Transcription MCQ Question
Select the wrong pair
RNA polymerase I⁻Sn RNA 5S rRNA, r-RNA
RNA polymerase I⁻r-RNA
RNA polymerase II⁻hnRNA
RNA polymerase III⁻tRNA
Correct Answer
Detailed Explanation
Option A is incorrect because RNA polymerase I primarily synthesizes ribosomal RNA (rRNA), specifically 28S, 18S, and 5.8S rRNA, but not 5S rRNA, which is synthesized by RNA polymerase III. Option B is correct as RNA polymerase I does produce rRNA, while option C is accurate since RNA polymerase II synthesizes heterogeneous nuclear RNA (hnRNA), which is the precursor to mRNA. Lastly, option D is also correct because RNA polymerase III is responsible for synthesizing transfer RNA (tRNA).
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