Types of RNA polymerase required in nucleus for RNA synthesis : -

Options

A. 1
B. 2
C. 3
D. 4

Answer

To answer the question regarding the types of RNA polymerase required in the nucleus for RNA synthesis, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Role of RNA Polymerase**:
- RNA polymerases are enzymes that synthesize RNA from a DNA template during the process of transcription.

2. **Identify the Types of RNA Polymerase in Eukaryotes**:
- In eukaryotic cells, there are three main types of RNA polymerases that are responsible for synthesizing different types of RNA:
- **RNA Polymerase I**: This enzyme is primarily responsible for synthesizing ribosomal RNA (rRNA), except for 5S rRNA.
- **RNA Polymerase II**: This enzyme synthesizes messenger RNA (mRNA) and is also involved in the synthesis of small nuclear RNAs (snRNA).
- **RNA Polymerase III**: This enzyme synthesizes transfer RNA (tRNA), 5S rRNA, and other small RNAs.

3. **Count the Types of RNA Polymerase**:
- Based on the information above, we can conclude that there are three types of RNA polymerases (RNA Polymerase I, II, and III) that function in the nucleus for RNA synthesis.

4. **Select the Correct Answer**:
- Given the options presented in the question (1, 2, 3, or 4), the correct answer is **option C: 3**.

### Final Answer:
The types of RNA polymerase required in the nucleus for RNA synthesis are three: RNA Polymerase I, RNA Polymerase II, and RNA Polymerase III. Therefore, the answer is option C: 3.

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