Number of small nuclear RNAs is

Options

A. 5
B. 6
C. 7
D. 8

Answer

To determine the number of small nuclear RNAs (snRNAs), we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Concept of snRNA**: Small nuclear RNAs (snRNAs) are a class of RNA molecules that are involved in the splicing of pre-messenger RNA (pre-mRNA) in the nucleus of eukaryotic cells.

2. **Identify the Role of snRNA in Spliceosome**: The spliceosome is a complex that facilitates the removal of introns from pre-mRNA. It is composed of snRNAs and proteins.

3. **List the Known snRNAs**: The main snRNAs involved in the spliceosome include:
- U1
- U2
- U4
- U5
- U6

4. **Count the snRNAs**: From the list, we can see that there are a total of 5 snRNAs.

5. **Evaluate the Options**: The question provides four options: 5, 6, 7, or 8. Since we have established that there are 5 snRNAs, we can conclude that the correct answer is 5.

### Final Answer:
The number of small nuclear RNAs is **5**.

---