Conversion of urea to `CO_2` and ammonia is done by

Options

A. Pepsin
B. Urease
C. Lactase
D. Nuclease

Answer

To solve the question regarding the conversion of urea to carbon dioxide and ammonia, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Urea Metabolism**: Urea is a waste product formed from the breakdown of proteins in the liver. Its conversion to carbon dioxide and ammonia is part of the urea cycle, which is essential for detoxifying ammonia in the body.

2. **Identifying the Enzyme**: The enzyme responsible for the conversion of urea to carbon dioxide and ammonia is called **urease**. Urease catalyzes the hydrolysis of urea into ammonia and carbon dioxide.

3. **Chemical Reaction**: The reaction can be represented as:
\[ \text{(NH}_2\text{)}_2\text{CO (urea)} + \text{H}_2\text{O} \xrightarrow{\text{urease}} \text{CO}_2 + 2 \text{NH}_3 \]
This shows that one molecule of urea reacts with water to produce one molecule of carbon dioxide and two molecules of ammonia.

4. **Conclusion**: Therefore, the correct answer to the question is that the conversion of urea to carbon dioxide and ammonia is done by the enzyme **urease**.

### Final Answer:
The conversion of urea to carbon dioxide and ammonia is done by the enzyme **urease**.

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