Smallest cell organelle which called cell engine is

Options

A. Ribosome
B. Lysosome
C. Vacuoles
D. Endoplasmic reticulum

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for the smallest cell organelle that is referred to as the "cell engine."

2. **Analyzing the Options**: We need to evaluate the given options to determine which one is the smallest organelle and is commonly known as the "cell engine."

3. **Option 1 - Ribosome**:
- Ribosomes are indeed small organelles that play a crucial role in protein synthesis.
- They are composed of ribosomal RNA and proteins.
- Ribosomes can be found either free in the cytoplasm or attached to the endoplasmic reticulum (rough ER).
- Due to their essential function in synthesizing proteins, they are often referred to as the "cell engine."

4. **Option 2 - Lysosome**:
- Lysosomes are larger organelles that contain enzymes for digestion and waste removal.
- They are not referred to as the "cell engine" and are known for their role in breaking down waste materials.

5. **Option 3 - Vacuoles**:
- Vacuoles are storage organelles that can hold various substances, such as nutrients or waste products.
- They do not function as the "cell engine."

6. **Option 4 - Endoplasmic Reticulum (ER)**:
- The ER is involved in the synthesis of proteins and lipids but is not the smallest organelle.
- It is also not referred to as the "cell engine."

7. **Conclusion**: After evaluating all the options, the correct answer is **Ribosome**, as it is the smallest organelle and is commonly called the "cell engine" due to its vital role in protein synthesis.

**Final Answer**: Ribosome

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