In which process pyruvic acid undergoes complete oxidation and produces carbon dioxide and water?

Options

A. Excretion
B. Anaerobic respiration
C. Aerobic respiration
D. Transportation

Explanation

**Step-by-Step Solution:**

1. **Understanding Pyruvic Acid**: Pyruvic acid is the end product of glycolysis, which is the process that breaks down glucose to produce energy.

2. **Identifying the Process for Complete Oxidation**: The question asks about the process where pyruvic acid undergoes complete oxidation. This process is known as aerobic respiration.

3. **Role of Oxygen**: Aerobic respiration occurs in the presence of oxygen. It is essential for the complete oxidation of pyruvic acid.

4. **Location of the Process**: The complete oxidation of pyruvic acid takes place in the mitochondria of the cell. This is where the Krebs cycle (also known as the citric acid cycle) occurs.

5. **Products of the Process**: During the Krebs cycle, pyruvic acid is further broken down, resulting in the production of carbon dioxide (CO2) and water (H2O) as by-products.

6. **Conclusion**: Therefore, the process in which pyruvic acid undergoes complete oxidation to produce carbon dioxide and water is aerobic respiration, specifically during the Krebs cycle.

**Final Answer**: The process is aerobic respiration, which includes the Krebs cycle.

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