Ribozymes are nucleic acids with catalytic power.

Explanation

**Step-by-Step Solution:**

1. **Understanding Ribozymes**: Ribozymes are a specific type of RNA molecule that possess catalytic properties. Unlike traditional enzymes, which are typically proteins, ribozymes are made of nucleic acids.

2. **Catalytic Power**: The term "catalytic power" refers to the ability of a substance to accelerate a chemical reaction without being consumed in the process. Ribozymes can facilitate biochemical reactions, similar to how protein enzymes function.

3. **Examples of Ribozymes**: One of the primary functions of ribozymes is in RNA splicing. RNA splicing is a process where non-coding regions (introns) are removed from the RNA transcript, allowing the coding regions (exons) to be joined together. This is crucial for gene expression, as it ensures that the correct protein is synthesized from the mRNA.

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