The structure that are subunits of ribosomes manufactured in the nucleolus, inside the nucleus.
In eukaryotes the ribosomes are produced and assembled in the nucleolus. Here, the ribosomal proteins enters the nucleolus and combines with new four ribosomal RNA strand and create the two ribosomal subunit one is larger subunit 60s and another is smaller subunit 40s.
Then the ribosomes are connected by the 12 molecular bridges and both unit overlap to form 80s ribosome. The assembly of the ribosomes also took place in the nucleolus. Now the ribosomes undergoes the translation, formation of proteins.
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