sn RNA is functional when

Options

A. Conjugated to proteins
B. Conjugated to lipids
C. Conjugated to oligosaccharides
D. Alone.

Answer

### Step-by-Step Solution:

1. **Understanding Small Nuclear RNA (snRNA)**:
- Small nuclear RNA (snRNA) is a type of RNA that plays a crucial role in the processing of pre-messenger RNA (pre-mRNA) in eukaryotic cells.

2. **Functionality of snRNA**:
- snRNA is not functional in isolation. It requires association with proteins to perform its biological functions.

3. **Formation of Ribonucleoprotein Complex**:
- When snRNA combines with proteins, it forms a ribonucleoprotein complex. This complex is essential for the function of snRNA.

4. **Role of snRNA in Spliceosomes**:
- The ribonucleoprotein complexes that include snRNA are known as small nuclear ribonucleoproteins (snRNPs). These snRNPs are integral components of spliceosomes, which are responsible for splicing pre-mRNA.

5. **Conclusion**:
- Therefore, snRNA is functional when it is conjugated to proteins, forming a ribonucleoprotein complex necessary for its role in mRNA processing.

### Answer:
snRNA is functional when conjugated to proteins.

---