Which one of the following human cells does not contain mitochondria

Options

A. Nerve cell
B. Red blood cell
C. Liver cell
D. White blood cells

Answer

To determine which human cell does not contain mitochondria, we will analyze each of the given options: nerve cell, red blood cell, liver cell, and white blood cell.

### Step-by-Step Solution:

1. **Understanding Mitochondria**:
- Mitochondria are known as the "powerhouses" of the cell because they are responsible for producing energy through cellular respiration. They convert nutrients into energy.

2. **Analyzing Nerve Cells**:
- Nerve cells, also known as neurons, are specialized cells that transmit signals in the nervous system. They contain a nucleus and mitochondria to provide the energy needed for their functions.
- **Conclusion**: Nerve cells contain mitochondria.

3. **Analyzing Red Blood Cells**:
- Red blood cells (RBCs) are primarily responsible for transporting oxygen throughout the body. Interestingly, during their maturation, they lose their nucleus and other organelles, including mitochondria, to maximize space for hemoglobin.
- **Conclusion**: Red blood cells do not contain mitochondria.

4. **Analyzing Liver Cells**:
- Liver cells (hepatocytes) play a crucial role in metabolism, detoxification, and the production of bile. They are highly active cells and contain numerous mitochondria to meet their energy demands.
- **Conclusion**: Liver cells contain mitochondria.

5. **Analyzing White Blood Cells**:
- White blood cells (leukocytes) are part of the immune system and help fight infections. They also contain mitochondria, which provide energy for their immune functions.
- **Conclusion**: White blood cells contain mitochondria.

6. **Final Conclusion**:
- After analyzing all options, the only cell type that does not contain mitochondria is the red blood cell.

### Answer:
The correct answer is **B) Red Blood Cell**.

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