Fermentation ability of Yeast is due to

Options

A. Amylase
B. Galactase
C. Zymase
D. Invertase

Answer

**Step-by-Step Solution:**

1. **Understanding Fermentation**: Fermentation is a metabolic process that converts sugars into acids, gases, or alcohol in the absence of oxygen. Yeast, particularly Saccharomyces cerevisiae, is commonly used in fermentation.

2. **Identifying Enzymes**: The question provides four options: amylase, galactase, zymase, and invertase. We need to determine which enzyme is responsible for the fermentation ability of yeast.

3. **Analyzing Each Option**:
- **Amylase**: This enzyme breaks down polysaccharides into simpler sugars, but it is not directly involved in the fermentation process of yeast.
- **Galactase**: This enzyme is responsible for breaking down lactose into glucose and galactose. It is not primarily involved in fermentation.
- **Zymase**: This is a complex of enzymes found in yeast that is directly responsible for the fermentation process. Zymase converts sugars into ethanol and carbon dioxide, which is the essence of fermentation in yeast.
- **Invertase**: This enzyme hydrolyzes sucrose into glucose and fructose. While it plays a role in sugar breakdown, it is not the main enzyme responsible for fermentation.

4. **Conclusion**: Based on the analysis, the fermentation ability of yeast is due to the presence of zymase, which facilitates the conversion of sugars into ethanol and carbon dioxide.

**Final Answer**: The fermentation ability of yeast is due to **zymase**.

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