Questions: Which organelle contains the nucleolus?

The organelle that contains the nucleolus is the nucleus.

Explanation:

• The nucleus is a membrane-bound organelle found in eukaryotic cells. It serves as the control center of the cell, housing the cell's genetic material (DNA).
• The nucleolus is a distinct, dense region within the nucleus. It is not surrounded by a membrane but is a substructure where ribosomal RNA (rRNA) is synthesized and combined with proteins to form ribosomal subunits.
• The nucleolus plays a crucial role in the production of ribosomes, which are essential for protein synthesis in the cell.

In summary, the nucleolus is located within the nucleus of a cell.