Formation of carbonic acid from carbon dioxide and water is catalysed by

Options

A. Carbonic anhydrase
B. Adenylate cyclase
C. Restriction endonuclease
D. Phenylalanine hydroxylase

Answer

To answer the question regarding the formation of carbonic acid from carbon dioxide and water, we can break down the solution into the following steps:

### Step-by-Step Solution:

1. **Understanding the Reaction**:
- The formation of carbonic acid (H2CO3) occurs when carbon dioxide (CO2) reacts with water (H2O).
- The chemical equation for this reaction is:
\[ CO2 + H2O \rightarrow H2CO3 \]

2. **Identifying the Rate of Reaction**:
- The natural formation of carbonic acid from CO2 and H2O is a slow process. This means that without any catalyst, the reaction does not occur rapidly.

3. **Role of Enzymes**:
- To speed up this reaction, a catalyst is required. In biological systems, enzymes serve as catalysts to accelerate chemical reactions.

4. **Identifying the Specific Enzyme**:
- The enzyme responsible for catalyzing the formation of carbonic acid from carbon dioxide and water is called **carbonic anhydrase**.
- Carbonic anhydrase is a protein enzyme that significantly increases the rate of this reaction, allowing it to occur in a fraction of a second.

5. **Conclusion**:
- Therefore, the answer to the question is that the formation of carbonic acid from carbon dioxide and water is catalyzed by **carbonic anhydrase**.

### Final Answer:
The formation of carbonic acid from carbon dioxide and water is catalyzed by **carbonic anhydrase**.

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