Assuming you mean "nucleus", the answer will depend on what what nucleus you are talking about (atomic nucleus, the nucleus of a cell, etc.).
Ribosomes
Ribosomes are constructed in the nucleolus, a region within the nucleus of a cell. The nucleolus is responsible for assembling ribosomal RNA (rRNA) and combining it with proteins to form ribosomes. Once assembled, ribosomes are then transported to the cytoplasm where they carry out protein synthesis.
Nucleolus build up two parts.Later they are joined in cytoplasm.They are made in nucleous.It is in the nucleus.
Nucleolus.
The small spherical body within the nucleus is called the nucleolus. It is involved in the production of ribosomes, which are essential for protein synthesis in the cell.
Nucleolus
Nucleolus :)
It's called a nucleolus
The nucleolus is not a plant, but an organelle within the nucleus of a cell. The nucleolus transcribes and assembles RNA.
a protecting layer over the nucleolus
The nucleolus
The nucleolus is in the nucleus of the cell.