Nissl granules are made up of

Options

A. Ribosomes and RNA
B. DNA and proteins
C. Ribosomes and DNA
D. RNA, DNA, and proteins

Answer

**Step-by-Step Solution:**

1. **Understanding Nissl Granules**: Nissl granules are structures found in neurons (nerve cells). They are important for the synthesis of proteins within the neuron.

2. **Composition of Nissl Granules**: The question asks what Nissl granules are made up of. The key components of Nissl granules are ribosomes and RNA. Ribosomes are the sites of protein synthesis, and RNA (specifically mRNA) plays a crucial role in translating the genetic code into proteins.

3. **Analyzing the Options**:
- **Option 1**: Ribosome and RNA - This option is correct as it accurately describes the composition of Nissl granules.
- **Option 2**: DNA and proteins - This option is incorrect because while DNA is present in the cell, it is not a component of Nissl granules.
- **Option 3**: Ribosome and DNA - This option is also incorrect for the same reason as option 2; Nissl granules do not contain DNA.
- **Option 4**: This option is not provided in detail but based on the previous analysis, it can be inferred that it is incorrect.

4. **Conclusion**: The correct answer is that Nissl granules are made up of ribosomes and RNA.

**Final Answer**: Nissl granules are made up of ribosome and RNA.

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