Fermentation products of Yeast are

Options

A. `H_(2)O+CO_(2)`
B. Methyl alcohol `+CO_(2)`
C. Methyl alcohol + Water
D. Ethyl alcohol `+CO_(2)`

Answer

To answer the question about the fermentation products of yeast, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Fermentation**: Fermentation is a type of anaerobic respiration that occurs in the absence of oxygen. It is a metabolic process that converts sugar to acids, gases, or alcohol.

2. **Starting Material**: The process begins with glucose, which is broken down through glycolysis to produce pyruvate. Glycolysis is the first step in both aerobic and anaerobic respiration.

3. **Formation of Pyruvate**: During glycolysis, one molecule of glucose (C6H12O6) is converted into two molecules of pyruvate (C3H4O3). This process also generates a small amount of ATP and NADH.

4. **Anaerobic Pathway**: In the absence of oxygen, the pyruvate undergoes fermentation. In yeast, this process is known as alcoholic fermentation.

5. **Products of Fermentation**: During alcoholic fermentation, each pyruvate molecule is converted into ethanol (ethyl alcohol) and carbon dioxide. Specifically, two molecules of pyruvate yield two molecules of ethanol and two molecules of carbon dioxide.

6. **Final Products**: Therefore, the main products of yeast fermentation are ethanol and carbon dioxide.

7. **Evaluating Options**: Given the options:
- Water and carbon dioxide
- Methyl alcohol plus carbon dioxide
- Methyl alcohol plus water
- Methyl alcohol plus carbon dioxide
- Ethanol plus carbon dioxide

The correct answer is **Ethanol plus carbon dioxide**.

### Final Answer:
The fermentation products of yeast are **Ethanol and Carbon Dioxide**.

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