Which of the following is not a function of RNA?

Options

A. Messenger
B. Catalysis
C. Adapter
D. Modifier

Answer

To determine which of the following is not a function of RNA, we need to analyze the roles of the different types of RNA.

### Step-by-Step Solution:

1. **Identify the Types of RNA**:
- There are three main types of RNA:
- **mRNA (messenger RNA)**: This type of RNA carries the genetic information from DNA to the ribosome, where proteins are synthesized.
- **tRNA (transfer RNA)**: This type of RNA helps in the transfer of amino acids during protein synthesis by bringing the appropriate amino acids to the ribosome.
- **rRNA (ribosomal RNA)**: This type of RNA is a structural component of ribosomes and plays a crucial role in the synthesis of proteins.

2. **List the Functions of RNA**:
- **Messenger**: mRNA serves as a messenger carrying information from DNA for protein synthesis.
- **Catalysis**: Some RNA molecules, known as ribozymes, can act as catalysts in biochemical reactions.
- **Adapter**: tRNA acts as an adapter molecule that brings amino acids to the ribosome during translation.

3. **Analyze the Options**:
- The options given are:
- A) Messenger
- B) Catalysis
- C) Adapter
- D) Modifier
- From our analysis, we see that:
- A) Messenger is a function of mRNA.
- B) Catalysis is a function of some RNA molecules (ribozymes).
- C) Adapter is a function of tRNA.
- D) Modifier is not a recognized function of RNA.

4. **Conclusion**:
- The function that is not associated with RNA is **Modifier**. Therefore, the correct answer is **D) Modifier**.