Identify the cell organelle in which respiration in a living cell takes place.

Options

A. Mitochondria
B. Ribosome
C. Endoplasmic reticulum
D. Golgi complex

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for the cell organelle where respiration occurs in a living cell.

2. **Identifying the Options**: The options provided are:
- A) Mitochondria
- B) Ribosome
- C) Endoplasmic Reticulum
- D) Golgi Complex

3. **Analyzing Each Option**:
- **Mitochondria**: Known as the "powerhouse of the cell," mitochondria are responsible for producing energy through the process of cellular respiration.
- **Ribosome**: Ribosomes are involved in protein synthesis, not respiration.
- **Endoplasmic Reticulum**: The endoplasmic reticulum is involved in the synthesis of proteins and lipids, but not directly in respiration.
- **Golgi Complex**: The Golgi complex is involved in modifying, sorting, and packaging proteins, not in respiration.

4. **Conclusion**: Based on the analysis, the organelle responsible for respiration is the mitochondria. It is where ATP (adenosine triphosphate) is produced, which is essential for energy in the cell.

5. **Final Answer**: The correct answer is A) Mitochondria.

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