Which one of the following enzyme is secreted by yeast for Fermentation?

Options

A. Streptococcus
B. Staphylococcus
C. Lactobacillus
D. Saccharomyces

Answer

To answer the question "Which one of the following enzyme is secreted by yeast for fermentation?", we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Organism**: The organism in question is yeast, specifically the species known as Saccharomyces cerevisiae. This is a eukaryotic, single-celled microorganism that belongs to the kingdom Fungi.

2. **Understand the Process**: Yeast is known for its ability to convert carbohydrates into alcohol and carbon dioxide through a process called fermentation. This is a crucial metabolic pathway that allows yeast to generate energy in the absence of oxygen.

3. **Identify the Enzyme**: The specific enzyme complex that yeast secretes to facilitate fermentation is called the zymase complex. This complex is responsible for catalyzing the biochemical reactions that convert sugars into ethanol and carbon dioxide.

4. **Historical Context**: The zymase complex was first isolated from yeast cells in 1897 by a scientist named Edward Buckner, which highlights its significance in the study of fermentation.

5. **Conclusion**: Therefore, the enzyme secreted by yeast for fermentation is the zymase complex.

### Final Answer:
The enzyme secreted by yeast for fermentation is the zymase complex.

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