Fumarase enzyme converts

Options

A. Succinic acid to malic acid
B. Succinic acid to fumaric acid
C. Fumaric acid to malic acid
D. Fumaric acid to citric acid

Answer

To answer the question regarding what the fumarase enzyme converts, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Context**: The fumarase enzyme is involved in the Krebs cycle (also known as the citric acid cycle or TCA cycle), which is a series of chemical reactions used by all aerobic organisms to generate energy.

2. **Identify the Substrates**: The question provides four options regarding what fumarase converts. The relevant compounds are:
- Succinic acid
- Fumaric acid
- Malic acid
- Citric acid

3. **Recall the Reaction Catalyzed by Fumarase**: Fumarase catalyzes the reversible hydration of fumaric acid to malic acid. This means that fumarase converts fumaric acid into malic acid.

4. **Eliminate Incorrect Options**:
- Option 1: Succinic acid to malic acid - Incorrect.
- Option 2: Succinic acid to fumaric acid - Incorrect.
- Option 3: Fumaric acid to malic acid - Correct.
- Option 4: Fumaric acid to citric acid - Incorrect.

5. **Conclusion**: Based on the above understanding, the fumarase enzyme specifically converts fumaric acid to malic acid.

### Final Answer:
The fumarase enzyme converts fumaric acid to malic acid.

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