An example of a biocatalyst is

Options

A. Amino acid
B. Enzyme
C. Carbohydrate
D. DNA

Answer

To determine an example of a biocatalyst, let's analyze the options provided:

1. **Understanding Biocatalysts**:
- Biocatalysts are substances that accelerate chemical reactions in biological systems. They are typically proteins or nucleic acids that facilitate biochemical reactions without being consumed in the process.

2. **Evaluating the Options**:
- **Amino Acid**: Amino acids are the building blocks of proteins, but they do not catalyze reactions themselves. Therefore, they are not considered biocatalysts.
- **Enzyme**: Enzymes are proteins that act as biocatalysts. They speed up biochemical reactions by lowering the activation energy required for the reaction to occur. Examples include pepsin and trypsin.
- **Carbohydrate**: Carbohydrates serve primarily as energy sources and structural components in cells, but they do not function as catalysts. Thus, they are not biocatalysts.
- **DNA**: DNA carries genetic information and plays a role in the synthesis of proteins, but it does not catalyze reactions. Therefore, it is not classified as a biocatalyst.

3. **Conclusion**:
- Among the options provided, the only correct example of a biocatalyst is **enzyme**.

**Final Answer**: Enzyme

---