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RNA polymerase I catalyses synthesis of...

RNA polymerase I catalyses synthesis of

A

rRNA

B

t RNA

C

mRNA

D

Sn RNA

Text Solution

AI Generated Solution

The correct Answer is:
**Step-by-Step Solution:** 1. **Understanding RNA Polymerases**: In eukaryotic cells, there are three types of RNA polymerases: RNA polymerase I (RNA Pol I), RNA polymerase II (RNA Pol II), and RNA polymerase III (RNA Pol III). Each of these enzymes has a specific role in the transcription of different types of RNA. 2. **Role of RNA Polymerase I**: RNA Pol I is specifically responsible for synthesizing ribosomal RNA (rRNA). This type of RNA is a crucial component of ribosomes, which are the cellular machinery responsible for protein synthesis. 3. **Distinguishing Other RNA Polymerases**: - RNA Pol II synthesizes messenger RNA (mRNA), which carries genetic information from DNA to the ribosomes for protein synthesis. It also synthesizes small nuclear RNA (snRNA) and microRNA (miRNA). - RNA Pol III synthesizes transfer RNA (tRNA) and 5S rRNA, which are also important for protein synthesis and ribosome function. 4. **Conclusion**: Therefore, the correct answer to the question is that RNA polymerase I catalyzes the synthesis of ribosomal RNA (rRNA). **Final Answer**: RNA polymerase I catalyzes the synthesis of ribosomal RNA (rRNA). ---
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