Fumarase removes

Options

A. `O_(2)`
B. `CO_(2)`
C. `H_(2)O`
D. Protons

Answer

### Step-by-Step Solution:

1. **Understanding Fumarase**: Fumarase is an enzyme that plays a crucial role in the citric acid cycle (Krebs cycle). It catalyzes the reversible reaction between fumarate and malate.

2. **Identifying the Reaction**: The specific reaction that fumarase catalyzes involves the addition or removal of water. The enzyme facilitates the conversion of fumarate into malate by adding a water molecule (hydration) to fumarate.

3. **Analyzing the Options**:
- **Option 1: Oxygen** - This is not correct as fumarase does not remove oxygen.
- **Option 2: Carbon Dioxide** - This is also not correct as fumarase does not remove carbon dioxide.
- **Option 3: Water** - This is the correct answer. Fumarase removes water in the conversion of fumarate to malate.
- **Option 4: Protons** - This is incorrect as fumarase does not remove protons.

4. **Conclusion**: Based on the analysis, the correct answer is that fumarase removes water.

### Final Answer:
Fumarase removes water.

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