Which enzyme converts glucose and fructose both into ethanol ?

Options

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

Answer

To answer the question, "Which enzyme converts glucose and fructose both into ethanol?", we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Source of Glucose and Fructose**:
- Glucose and fructose can be derived from sucrose, which is a disaccharide composed of glucose and fructose.

2. **Enzyme for Hydrolysis of Sucrose**:
- The enzyme that converts sucrose into glucose and fructose is called **invertase**. This enzyme catalyzes the hydrolysis of sucrose, breaking it down into its monosaccharide components.

3. **Fermentation Process**:
- To convert glucose and fructose into ethanol, a fermentation process is utilized. This process is primarily carried out by yeast.

4. **Identifying the Specific Enzyme**:
- The specific enzyme used by yeast for the fermentation of glucose and fructose into ethanol is called **zymase**. Zymase is a complex of enzymes that facilitates the conversion of sugars into ethanol and carbon dioxide.

5. **Chemical Reaction**:
- During fermentation, glucose and fructose are converted into ethanol (ethyl alcohol, CH3CH2OH) and carbon dioxide (CO2). The overall reaction can be summarized as:
\[ \text{C}_6\text{H}_{12}\text{O}_6 \rightarrow 2 \text{C}_2\text{H}_5\text{OH} + 2 \text{CO}_2 \]
- This means that from one molecule of glucose or fructose, two molecules of ethanol and two molecules of carbon dioxide are produced.

### Final Answer:
The enzyme that converts glucose and fructose both into ethanol is **zymase**.