Which of the following enzymes is involved in fermentation ?

Options

A. Pyruvate dehydrogenase
B. Pyruvic acid decarboxylase
C. Succinate dehydrogenase
D. Citrate dehydrogenase

Answer

To answer the question "Which of the following enzymes is involved in fermentation?", we can follow these steps:

### Step-by-Step Solution:

1. **Understand Fermentation**: Fermentation is an anaerobic process, meaning it occurs in the absence of oxygen. It is a type of respiration that converts glucose into energy.

2. **Identify the Process**: The initial step in fermentation involves glycolysis, where glucose is broken down into pyruvic acid (or pyruvate).

3. **Types of Fermentation**: There are various types of fermentation, including alcoholic fermentation and lactic acid fermentation. In alcoholic fermentation, pyruvic acid is converted into ethanol and carbon dioxide.

4. **Key Enzymes in Fermentation**: During alcoholic fermentation, the enzyme that plays a crucial role is pyruvate decarboxylase. This enzyme catalyzes the conversion of pyruvic acid to acetaldehyde, which is a key step in the fermentation process.

5. **Conclusion**: Therefore, the enzyme involved in fermentation, specifically in alcoholic fermentation, is pyruvate decarboxylase.

### Final Answer:
The enzyme involved in fermentation is **pyruvate decarboxylase**.

---