Conversion of pyruvic acid into ethyl alcohol is mediated by

Options

A. Phosphatase
B. Dehydrogenase
C. Decarboxylase and dehydrogenase
D. Catalase

Answer

**Step-by-Step Solution:**

1. **Understanding the Process**: The conversion of pyruvic acid into ethyl alcohol occurs through a process known as fermentation. This process involves two main steps: the decarboxylation of pyruvic acid and the reduction of acetaldehyde to ethyl alcohol.

2. **First Step - Decarboxylation**: The first step in the conversion of pyruvic acid (C3H4O3) is its decarboxylation, where a carbon dioxide molecule is removed, resulting in the formation of acetaldehyde (C2H4O).

3. **Enzyme for Decarboxylation**: The enzyme responsible for this decarboxylation reaction is called **pyruvate decarboxylase**. This enzyme catalyzes the removal of the carboxyl group from pyruvic acid.

4. **Second Step - Reduction**: After the formation of acetaldehyde, the next step is the reduction of acetaldehyde to ethyl alcohol (C2H5OH).

5. **Enzyme for Reduction**: The enzyme that catalyzes this reduction is **alcohol dehydrogenase**. This enzyme facilitates the conversion of acetaldehyde into ethyl alcohol by adding hydrogen.

6. **Conclusion**: Therefore, the conversion of pyruvic acid into ethyl alcohol is mediated by the combination of two enzymes: **pyruvate decarboxylase** and **alcohol dehydrogenase**.

7. **Correct Answer**: Based on the options provided, the correct answer is **C**, which indicates the presence of both enzymes.

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