Which of the following represent the dominance of RNA world ?

Options

A. Splicing
B. Translation
C. Both (1) and (2)
D. Replication

Answer

To determine which of the options represents the dominance of the RNA world, let's analyze the choices provided: splicing, translation, both one and two, or replication.

### Step-by-Step Solution:

1. **Understanding the RNA World Hypothesis**: The RNA world hypothesis suggests that early life forms may have relied on RNA for both genetic information storage and catalysis, preceding the dominance of DNA and proteins.

2. **Analyzing Splicing**:
- Splicing is a process that occurs during the maturation of RNA. It involves the removal of introns (non-coding regions) from the pre-mRNA and the joining of exons (coding regions).
- This process is crucial for the proper expression of genes and highlights the role of RNA in controlling genetic information.

3. **Analyzing Translation**:
- Translation is the process by which messenger RNA (mRNA) is decoded to synthesize proteins.
- This process also emphasizes the importance of RNA, as it serves as the template for protein synthesis, indicating that RNA plays a central role in the flow of genetic information.

4. **Considering Replication**:
- Replication refers to the process of copying DNA. While RNA can replicate in certain viruses, the traditional understanding of replication is primarily associated with DNA.
- Therefore, replication does not directly represent the dominance of the RNA world.

5. **Conclusion**:
- Since both splicing and translation are processes that involve RNA and demonstrate its dominance in controlling genetic information and protein synthesis, the correct answer is "both one and two."

### Final Answer:
The correct answer is **both one and two** (option 3).

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