Flagella occur in

Options

A. Eukaryotic cell
B. Lysosomes
C. Mitochondria
D. Ribosomes

Answer

**Step-by-Step Solution:**

1. **Understanding Flagella**:
- Flagella are long, whip-like structures that aid in the movement of cells. They are primarily used for locomotion.

2. **Identifying the Options**:
- The question asks where flagella occur, and we have several options: eukaryotic cells, lysosomes, mitochondria, and ribosomes.

3. **Analyzing Each Option**:
- **Eukaryotic Cells**:
- Flagella are present in certain eukaryotic cells, such as sperm cells. In sperm cells, the flagellum helps propel the sperm through the female reproductive tract towards the ovum.
- **Lysosomes**:
- Lysosomes are organelles that contain digestive enzymes. They do not have flagella; instead, they function in breaking down waste materials and cellular debris.
- **Mitochondria**:
- Mitochondria are known as the powerhouse of the cell, responsible for producing energy through cellular respiration. They do not have flagella.
- **Ribosomes**:
- Ribosomes are involved in protein synthesis. They are not motile structures and do not contain flagella.

4. **Conclusion**:
- Based on the analysis, the only option where flagella occur is in eukaryotic cells, specifically in sperm cells.

5. **Final Answer**:
- Flagella occur in eukaryotic cells.

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