Energy releasing reaction in a cell occurs in

Options

A. Cell wall
B. Ribosomes
C. Mitochondria
D. Plastids

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks where energy-releasing reactions occur in a cell. This involves identifying the organelle responsible for energy production.

2. **Analyzing the Options**: The options provided are:
- Cell wall
- Ribosome
- Mitochondria
- Plastid

3. **Evaluating Each Option**:
- **Cell Wall**: The cell wall provides structural support and protection but does not participate in energy production. Therefore, this option is incorrect.
- **Ribosome**: Ribosomes are involved in protein synthesis, not energy production. Thus, this option is also incorrect.
- **Plastid**: Plastids, such as chloroplasts, are involved in photosynthesis and storage but are not primarily responsible for energy release in the form of ATP. Hence, this option is incorrect.
- **Mitochondria**: Mitochondria are known as the "powerhouse of the cell" because they are the primary site for ATP (adenosine triphosphate) production through cellular respiration. This option is correct.

4. **Conclusion**: Based on the analysis, the correct answer is **Mitochondria**, as it is the organelle where energy-releasing reactions occur in the cell.

**Final Answer**: Mitochondria

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