The breakdown of pyruvate to give carbon dioxide, water and energy takes place in

Options

A. cytoplasm.
B. chloroplast.
C. mitochondria.
D. nucleus.

Explanation

### Step-by-Step Solution:

1. **Understanding Pyruvate Breakdown**: The question asks about the breakdown of pyruvate, which is a key intermediate in cellular respiration. Pyruvate is produced during glycolysis, which occurs in the cytoplasm of the cell.

2. **Identifying the Process**: The breakdown of pyruvate involves converting it into carbon dioxide (CO2), water (H2O), and energy (ATP). This process is a part of cellular respiration.

3. **Location of the Process**: The breakdown of pyruvate occurs in the mitochondria of the cell. Mitochondria are known as the powerhouses of the cell because they are responsible for producing energy.

4. **Type of Respiration**: This process is known as aerobic respiration, which requires oxygen. During aerobic respiration, pyruvate reacts with oxygen to produce carbon dioxide, water, and energy.

5. **Energy Production**: In aerobic respiration, a total of 38 molecules of ATP (adenosine triphosphate) are produced from one molecule of glucose, which is broken down into pyruvate and then further processed in the mitochondria.

6. **Byproducts**: The carbon dioxide produced is expelled from the body during breathing, while the water produced is used in various metabolic processes.

7. **Final Conclusion**: Therefore, the breakdown of pyruvate to give carbon dioxide, water, and energy takes place in the mitochondria through the process of aerobic respiration.

### Final Answer:
The breakdown of pyruvate to give carbon dioxide, water, and energy takes place in the mitochondria.

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