Ribosomal RNA is actively synthesised in

Options

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

Answer

**Step-by-Step Solution:**

1. **Understanding Ribosomal RNA (rRNA)**: Ribosomal RNA is one of the three main types of RNA found in cells, the others being messenger RNA (mRNA) and transfer RNA (tRNA). rRNA plays a crucial role in the formation of ribosomes, which are the cellular structures responsible for protein synthesis.

2. **Identifying the Site of rRNA Synthesis**: The synthesis of rRNA occurs in a specific part of the cell. It is important to know where this synthesis takes place to answer the question correctly.

3. **Role of the Nucleus**: The nucleus is the organelle that contains the cell's genetic material and is involved in various processes, including the synthesis of RNA. Within the nucleus, there are specific structures that facilitate this process.

4. **Nucleolus**: The nucleolus is a prominent structure within the nucleus. It is not surrounded by a membrane and is known for its role in synthesizing rRNA. The nucleolus assembles rRNA with proteins to form the ribosomal subunits.

5. **Conclusion**: Based on the information gathered, ribosomal RNA is actively synthesized in the nucleolus.

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

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