Mitochondria are called power houes of the cell. Which of the following observations support this statement?

Options

A. Mitochondria synthesise ATP
B. Mitochondria have a double membrane
C. The enzymes of the Krebs' cycle and the cytochromes are found in mitochondria.
D. Mitochondria are found in almost all plants and animal cells.

Explanation

**Step-by-Step Text Solution:**

1. **Understanding the Role of Mitochondria**: Mitochondria are known as the "powerhouses of the cell" primarily because they are the main site for ATP (adenosine triphosphate) production. ATP is often referred to as the energy currency of the cell, as it provides the necessary energy for various cellular processes.

2. **Structure of Mitochondria**: Mitochondria are double membrane-bound organelles. This structure is essential for their function, as the inner membrane contains proteins and enzymes necessary for ATP synthesis.

3. **ATP Production**: The process of ATP production occurs through cellular respiration, which takes place in the mitochondria. The Krebs cycle (also known as the citric acid cycle) and the electron transport chain, both of which are critical for ATP synthesis, occur in the mitochondria.

4. **Observations Supporting the Statement**:
- The first observation that supports the statement is that mitochondria synthesize ATP. This is the primary reason they are considered the powerhouse of the cell.
- Other observations, such as the presence of a double membrane, the location of enzymes for the Krebs cycle, and the fact that mitochondria are found in almost all plant and animal cells, while true, do not directly support the statement about them being the powerhouse.

5. **Conclusion**: Therefore, the most relevant observation that supports the statement "mitochondria are called powerhouses of the cell" is that they synthesize ATP.

**Correct Answer**: The correct observation that supports the statement is that mitochondria synthesize ATP.

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