Select the incorrect statement about nucleolus .

Options

A. It is membrane-less cell organelle.
B. It is active site for m-RNA synthesis .
C. These may be more than 1 in cells which are involved in active protein synthesis .
D. Found in nucleus .

Answer

To solve the question of identifying the incorrect statement about the nucleolus, we will analyze each option provided.

### Step-by-Step Solution:

1. **Understand the Nucleolus**:
- The nucleolus is a structure found within the nucleus of eukaryotic cells. It is involved in the synthesis of ribosomal RNA (rRNA) and the assembly of ribosomes.

2. **Evaluate Each Statement**:
- **Option 1**: "Membrane-less cell organelle."
- This statement is **correct**. The nucleolus does not have a surrounding membrane, making it a membrane-less organelle.

- **Option 2**: "Active site for the mRNA synthesis."
- This statement is **incorrect**. The nucleolus is primarily involved in the synthesis of rRNA, not mRNA. Therefore, calling it an active site for mRNA synthesis is a mischaracterization.

- **Option 3**: "There may be more than one nucleolus in cells."
- This statement is **correct**. Depending on the cell type and its activity, there can be multiple nucleoli present within a single nucleus.

- **Option 4**: "Found in nucleus."
- This statement is **correct**. The nucleolus is indeed located within the nucleus of eukaryotic cells.

3. **Conclusion**:
- After evaluating all the options, the incorrect statement about the nucleolus is **Option 2: "Active site for the mRNA synthesis."**

### Final Answer:
The incorrect statement about the nucleolus is: **"Active site for the mRNA synthesis."**