Most abundant, harmful and universal waste product of metabolism is

Options

A. Uric acid
B. `H_(2)O`
C. `CO_(2)`
D. None of the above

Answer

To solve the question regarding the most abundant, harmful, and universal waste product of metabolism, we can follow these steps:

### Step-by-Step Solution:

1. **Understand Metabolism**: Metabolism consists of various biochemical processes that occur within living organisms to maintain life. It includes both catabolic processes (breaking down molecules for energy) and anabolic processes (building up molecules).

2. **Identify Waste Products**: During metabolism, especially aerobic metabolism (which uses oxygen), various waste products are generated. The primary waste products include carbon dioxide (CO2), water (H2O), and nitrogenous wastes (like urea and uric acid).

3. **Analyze the Options**:
- **Uric Acid**: This is a waste product of purine metabolism and is less abundant compared to others.
- **Water (H2O)**: While produced in metabolism, it is not considered a harmful waste product.
- **Carbon Dioxide (CO2)**: This is produced in large quantities during aerobic respiration and is a significant waste product.
- **None of the Above**: This option implies that none of the listed substances are the answer.

4. **Evaluate Carbon Dioxide**: Carbon dioxide is produced in high amounts during the breakdown of carbohydrates, fats, and proteins in aerobic metabolism. It is transported in the blood and must be expelled from the body through the lungs. If CO2 accumulates in tissues, it can become toxic and disrupt metabolic processes.

5. **Conclusion**: Based on the analysis, carbon dioxide is the most abundant, harmful, and universal waste product of metabolism.

### Final Answer:
The most abundant, harmful, and universal waste product of metabolism is **carbon dioxide (CO2)**.

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