Mobility of mature sperm is controlled by mitochondria present in

Options

A. Head
B. Middle piece
C. Tail
D. All the above.

Answer

**Step-by-Step Solution:**

1. **Understanding the Structure of Mature Sperm:**
- Mature sperm consists of four main parts: the head, neck, middle piece, and tail. Each part has a specific function.

2. **Identifying the Function of Each Part:**
- The head contains the nucleus, which houses the DNA.
- The neck connects the head to the middle piece.
- The middle piece contains mitochondria, which are essential for energy production.
- The tail is responsible for the movement of the sperm, allowing it to swim through the female reproductive tract.

3. **Focusing on the Role of Mitochondria:**
- Mitochondria are known as the powerhouse of the cell. In the case of sperm, they provide the necessary energy (ATP) for the movement of the tail.

4. **Analyzing the Options:**
- Option A: Head - contains DNA, not mitochondria.
- Option B: Middle Piece - contains mitochondria, which control the mobility of the sperm.
- Option C: Tail - helps in movement but does not contain mitochondria.
- Option D: All of the above - not correct since only the middle piece contains mitochondria.

5. **Conclusion:**
- Based on the analysis, the correct answer is that the mobility of mature sperm is controlled by mitochondria present in the **middle piece** of the sperm.

**Final Answer: Middle Piece (Option B)**

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