Which is never the end product of glycolytic anaerobic respiration?

Options

A. `CO_(2)`
B. `H_(2)O`
C. `O_(2)`
D. alcohol

Answer

To solve the question "Which is never the end product of glycolytic anaerobic respiration?", we can follow these steps:

### Step-by-Step Solution:

1. **Understand Anaerobic Respiration**:
- Anaerobic respiration occurs in the absence of oxygen. It is a way for organisms to generate energy when oxygen is not available.

2. **Identify the End Products of Glycolytic Anaerobic Respiration**:
- During glycolytic anaerobic respiration, glucose is broken down to produce energy, and various end products can be formed depending on the organism and conditions.

3. **Evaluate the Given Options**:
- **Option 1: Carbon Dioxide (CO2)**: This is produced during anaerobic respiration, particularly in organisms like yeast during fermentation.
- **Option 2: Water (H2O)**: This is not typically produced as an end product of anaerobic respiration. Instead, it is more associated with aerobic respiration.
- **Option 3: Oxygen (O2)**: This is not produced in anaerobic respiration since it occurs in the absence of oxygen.
- **Option 4: Alcohol**: This is a common end product of anaerobic respiration, especially in yeast (ethanol fermentation).

4. **Determine the Correct Answer**:
- From the evaluation, we can conclude that **Water (H2O)** is never an end product of glycolytic anaerobic respiration.

### Final Answer:
The correct answer is **H2O (Water)**.

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