Cellular furnaces of cells are -

Options

A. Chloroplast
B. Mitochondria
C. Ribosome
D. Nucleus

Answer

**Step-by-Step Solution:**

1. **Understanding the Term "Furnace":**
- A furnace is a place where active production occurs, similar to an industrial setting where materials are processed and transformed.

2. **Identifying the Cellular Equivalent:**
- In the context of a cell, we need to identify which organelle functions as a "furnace" where energy production takes place.

3. **Recognizing Key Organelles:**
- The two main organelles involved in energy production are mitochondria and chloroplasts. However, chloroplasts are primarily involved in photosynthesis, while mitochondria are involved in cellular respiration.

4. **Function of Mitochondria:**
- Mitochondria are known as the "powerhouse of the cell" because they are responsible for producing ATP (adenosine triphosphate), which is the energy currency of the cell.

5. **Conclusion:**
- Therefore, the cellular furnaces of cells are mitochondria, as they continuously produce ATP through aerobic respiration.

**Final Answer:**
- The cellular furnaces of cells are mitochondria.

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