Ribosomal RNA is actively synthesized in :-

Options

A. Nucleoplasm
B. Ribosomes
C. Lysosomes
D. Nucleolus

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks where ribosomal RNA (rRNA) is actively synthesized within the cell.

2. **Analyzing the Options**:
- **Nucleoplasm**: This is the fluid matrix inside the nucleus. While it supports the contents of the nucleus, it is not involved in RNA synthesis.
- **Ribosomes**: These are the sites of protein synthesis, not RNA synthesis. They assemble amino acids into proteins.
- **Lysosomes**: These organelles contain digestive enzymes and are involved in breaking down waste materials and cellular debris. They do not synthesize RNA.
- **Nucleolus**: This is a dense structure within the nucleus known as the RNA factory. It is specifically responsible for the synthesis of ribosomal RNA.

3. **Conclusion**: After evaluating all the options, the correct answer is that ribosomal RNA is actively synthesized in the **Nucleolus**.

**Final Answer**: Ribosomal RNA is actively synthesized in the Nucleolus.

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