Questions: The dense body of protein and RNA inside the nucleus, which produces ribosomes, is called the square

The dense body of protein and RNA inside the nucleus, which produces ribosomes, is called the nucleolus.

Explanation: The nucleolus is a prominent sub-structure within the nucleus of eukaryotic cells. It is primarily involved in the synthesis and assembly of ribosomes. The nucleolus is composed of proteins, RNA, and DNA, and it is the site where ribosomal RNA (rRNA) is transcribed and combined with ribosomal proteins to form the subunits of ribosomes. These subunits are then transported out of the nucleus to the cytoplasm, where they combine to form functional ribosomes.