What is the role of RNA polymerase III?

Options

A. transcription of rRNA s
B. transcription of mRNA s
C. transcription of tRNA s
D. transcription of hnRNA s

Answer

**Step-by-Step Solution:**

1. **Understanding RNA Polymerase III**: RNA polymerase III is one of the three main types of RNA polymerases found in eukaryotic cells. Its primary role is to synthesize RNA from a DNA template.

2. **Identifying the Types of RNA Synthesized**: RNA polymerase III is responsible for the transcription of several types of RNA, including:
- Transfer RNA (tRNA)
- 5S ribosomal RNA (rRNA)
- Small nuclear RNA (snRNA), such as U6 small nuclear RNA

3. **Focus on tRNA**: Among the various types of RNA synthesized by RNA polymerase III, the transcription of tRNA is particularly significant. tRNA plays a crucial role in protein synthesis by bringing amino acids to the ribosome during translation.

4. **Conclusion**: Therefore, the primary role of RNA polymerase III can be summarized as the transcription of small, untranslated RNAs, with a notable emphasis on tRNA.

5. **Final Answer**: The role of RNA polymerase III is to transcribe tRNA, along with other small RNAs.

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