Nucleolus is made up of :-

Options

A. DNA and RNA
B. Lipid + Protein
C. RNA and Protein
D. Phospholipid

Answer

**Step-by-Step Solution:**

1. **Understanding the Nucleolus**: The nucleolus is a prominent sub-structure within the nucleus of eukaryotic cells. Its primary function is the synthesis of ribosomal RNA (rRNA) and the assembly of ribosomes.

2. **Analyzing the Options**:
- **Option 1: DNA and RNA**: This option is incorrect. While RNA is a component of the nucleolus, DNA is not part of the nucleolus structure itself; DNA is found in the nucleus.
- **Option 2: Lipid plus Protein**: This option is also incorrect. Lipids are not a component of the nucleolus, and proteins alone do not define its structure.
- **Option 3: RNA and Protein**: This option is correct. The nucleolus is primarily composed of ribosomal RNA (rRNA) and proteins that help in the formation of ribosomes.
- **Option 4: Phospholipid**: This option is incorrect as phospholipids are components of cell membranes and not part of the nucleolus.

3. **Conclusion**: After analyzing all options, the correct answer is that the nucleolus is made up of RNA and protein.

**Final Answer**: The nucleolus is made up of RNA and protein.

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