The end product of fermentation is

Options

A. `O_(2)`
B. `N_(2)O`
C. H2O
D. `C_(2)H_(5)OH`

Answer

### Step-by-Step Text Solution:

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

2. **Key Processes Involved**:
- Fermentation is commonly used in various industries, including baking (for dough rising) and alcohol production (in beverages).

3. **Chemical Reaction**:
- The primary substrate for fermentation is glucose (C6H12O6). During fermentation, one molecule of glucose is converted into two molecules of carbon dioxide (CO2) and two molecules of ethanol (C2H5OH).

4. **Final Equation**:
- The overall reaction can be summarized as:
\[ C6H12O6 \rightarrow 2CO2 + 2C2H5OH \]
- This indicates that glucose is broken down into carbon dioxide and ethanol.

5. **Identifying the End Products**:
- From the reaction, we can see that the end products of fermentation are carbon dioxide and ethanol. However, when specifically asked for the end product in the context of alcoholic fermentation, ethanol is often highlighted as the primary product.

6. **Conclusion**:
- Therefore, the end product of fermentation is **ethanol**.