This is the site of protein synthesis in a neuron.

Options

A. Mitochondria
B. Nucleus
C. Nissl body
D. Dendrite

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for the site of protein synthesis in a neuron. We need to identify which part of the neuron is responsible for this function.

2. **Evaluating the Options**:
- **Option 1: Mitochondria**: Mitochondria are known for their role in cellular respiration and ATP production, not protein synthesis. Therefore, this option is incorrect.
- **Option 2: Nucleus**: While the nucleus contains genetic material (DNA and RNA), it is not directly involved in the synthesis of proteins. The nucleus is responsible for transcription, but not the actual synthesis. Thus, this option is also incorrect.
- **Option 3: Nissl Bodies**: Nissl bodies are composed of rough endoplasmic reticulum (RER) and free ribosomes. They are specifically involved in the synthesis of proteins within the neuron. Therefore, this option is correct.
- **Option 4: Dendrites**: Dendrites are extensions of the neuron that receive signals but do not play a role in protein synthesis. Hence, this option is incorrect.

3. **Conclusion**: After evaluating all options, the correct answer is **Nissl Bodies** (Option 3), as they provide the site for protein synthesis in neurons.

**Final Answer**: Nissl Bodies (Option 3) are the site of protein synthesis in a neuron.

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