Product of fermentation of glucose by Yeast is

Options

A. `(C_(6)H_(10)O_(5))_(n)`
B. `C_(2)H_(5)OH`
C. `C_(6)H_(12)O_(6)`
D. `CH_(3)OH`

Answer

To determine the product of fermentation of glucose by yeast, we can follow these steps:

### Step-by-Step Solution:

1. **Start with Glucose**: The process begins with glucose, which is a simple sugar and the primary substrate for fermentation.

2. **Conversion to Glucose-6-Phosphate**: In the first step of glycolysis, glucose is phosphorylated to form glucose-6-phosphate.

3. **Formation of Fructose-6-Phosphate**: Glucose-6-phosphate is then converted into fructose-6-phosphate.

4. **Formation of Fructose-1,6-Bisphosphate**: The fructose-6-phosphate undergoes phosphorylation to form fructose-1,6-bisphosphate.

5. **Splitting of the Molecule**: The fructose-1,6-bisphosphate is then split into two three-carbon molecules, which include glyceraldehyde-3-phosphate.

6. **Conversion to 1,3-Diphosphoglycerate**: Glyceraldehyde-3-phosphate is converted into 1,3-diphosphoglycerate.

7. **Formation of Pyruvate**: The 1,3-diphosphoglycerate is further converted into pyruvate through a series of reactions.

8. **Decarboxylation of Pyruvate**: The pyruvate undergoes decarboxylation, where it loses a carbon dioxide molecule, resulting in the formation of acetaldehyde.

9. **Formation of Ethanol**: Finally, the acetaldehyde is reduced to form ethanol (C2H5OH), which is the end product of fermentation by yeast.

### Conclusion:
The main product of fermentation of glucose by yeast is **Ethanol (C2H5OH)**.

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