Nucleolus are rich in :-

Options

A. Deoxy Ribonucleoprotein
B. Lipoprotein
C. Ribonucleoprotein
D. r-RNA and m-RNA

Answer

**Step-by-Step Solution:**

1. **Understanding the Nucleolus**: The nucleolus is a prominent structure within the nucleus of eukaryotic cells. It is primarily involved in the synthesis and assembly of ribosomes.

2. **Identifying Components of the Nucleolus**: The nucleolus contains specific types of RNA and proteins. The key components include ribosomal RNA (rRNA) and ribonucleoproteins (RNPs).

3. **Analyzing the Options**:
- **Option 1: Dioxyribonucleoprotein**: This is incorrect as the nucleolus does not contain deoxyribonucleoproteins; it is primarily associated with ribonucleoproteins.
- **Option 2: Lipoprotein**: This is also incorrect. Lipoproteins are not a component of the nucleolus.
- **Option 3: Ribonucleoprotein**: This is the correct answer. The nucleolus is rich in ribonucleoproteins which are essential for ribosome synthesis.
- **Option 4: Ribosomal RNA and mRNA**: This option is partially correct because ribosomal RNA is present, but mRNA is not typically found in the nucleolus, making this option incorrect.

4. **Conclusion**: Based on the analysis, the nucleolus is rich in ribonucleoproteins, making option 3 the correct answer.

**Final Answer**: Ribonucleoprotein

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