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

Options

A. (a) Mitochondria synthesizes ATP
B. (b) Mitochondria have a double membrane
C. (c) The enzymes of the Krebs cycle and the cytochromes are found in mitochondria
D. (d) Mitochondria are found in almost all plant and animal cells.

Explanation

To answer the question "Mitochondria are called the powerhouse of the cell. Which of the following observations support this statement?" we need to analyze the given options and understand why mitochondria hold this title.

### Step-by-Step Solution:

1. **Understanding the Role of Mitochondria**:
- Mitochondria are essential organelles within cells that are primarily responsible for producing energy in the form of ATP (adenosine triphosphate). This energy is crucial for various cellular functions.

2. **Analyzing the Options**:
- **Statement A**: "Mitochondria synthesizes ATP."
- This statement directly supports the idea of mitochondria being the powerhouse of the cell because ATP is the energy currency of the cell.
- **Statement B**: "Mitochondria have a double membrane."
- While this is a structural feature of mitochondria, it does not directly explain their role in energy production.
- **Statement C**: "The enzymes of the Krebs cycle and the cytochromes are found in mitochondria."
- This statement is true and indicates that mitochondria are involved in metabolic processes that generate ATP, but it does not explicitly state that they produce ATP.
- **Statement D**: "Mitochondria are found in almost all plant and animal cells."
- This statement describes the ubiquity of mitochondria but does not explain their function as energy producers.

3. **Conclusion**:
- Among the options, **Statement A** is the most relevant and directly supports the statement that mitochondria are the powerhouse of the cell because they synthesize ATP, which is the energy required for cellular activities.

### Final Answer:
Hence, the correct answer is **Option A: Mitochondria synthesizes ATP.**

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