Spliceosomes are associated with

Options

A. DNA
B. hn RNA
C. mRNA
D. tRNA

Answer

### Step-by-Step Solution:

1. **Understanding Spliceosomes**:
- Spliceosomes are complex molecular machines found within cells that play a crucial role in the processing of RNA. They are primarily involved in the splicing of pre-mRNA.

2. **Identifying the Function of Spliceosomes**:
- The main function of spliceosomes is to remove non-coding sequences called introns from the precursor messenger RNA (pre-mRNA) and to join the coding sequences (exons) together. This process is essential for the maturation of mRNA before it is translated into protein.

3. **Analyzing the Options**:
- The options given are DNA, HNA, mRNA, and tRNA.
- DNA is the genetic material and is not directly involved in splicing.
- HNA is not a standard term in molecular biology; it may be a typographical error or confusion with RNA.
- tRNA (transfer RNA) is involved in translation, not splicing.
- mRNA (messenger RNA) is the type of RNA that undergoes splicing.

4. **Conclusion**:
- Since spliceosomes are specifically involved in the splicing of pre-mRNA, the correct answer is **mRNA**.

### Final Answer:
Spliceosomes are associated with **mRNA**.

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