Which of the following catalyses the conversion of glucose into ethanol?

Options

A. Zymase
B. Invertase
C. Maltase
D. Diastase

Answer

To solve the question, "Which of the following catalyzes the conversion of glucose into ethanol?", we can follow these steps:

### Step 1: Understand the process of fermentation
Fermentation is a metabolic process that converts sugar (like glucose) into acids, gases, or alcohol. In the case of glucose, it is converted into ethanol and carbon dioxide.

### Step 2: Identify the key components
The primary reactant in this process is glucose (C6H12O6). The products of the fermentation process are ethanol (C2H5OH) and carbon dioxide (CO2).

### Step 3: Recognize the role of enzymes
Enzymes are biological catalysts that speed up chemical reactions. In the fermentation of glucose to ethanol, specific enzymes are required to facilitate the conversion.

### Step 4: Identify the enzyme involved
The enzyme that catalyzes the conversion of glucose into ethanol is known as zymase. Zymase is a complex of enzymes found in yeast that helps in the fermentation process.

### Step 5: Write the chemical equation
The overall reaction can be represented as:
\[ \text{C}_6\text{H}_{12}\text{O}_6 \, (\text{glucose}) \xrightarrow{\text{zymase}} \text{C}_2\text{H}_5\text{OH} \, (\text{ethanol}) + \text{CO}_2 \, (\text{carbon dioxide}) \]

### Step 6: Conclusion
Based on the understanding of the fermentation process and the role of zymase, we conclude that the correct answer is zymase.

### Final Answer
The enzyme that catalyzes the conversion of glucose into ethanol is **Zymase**.

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