The parts of the subunits of ribosomes are assembled in the nucleolus while the subunits are assembled into ribosomes in the cytoplasm.
What is ribosome ?
In eukaryotes, ribosomes are located in cytoplasmic organelles, other type of ribosomes present in cell are chloroplast and mitochondrial ribosomes.
Ribosome have a sedimentation coefficient such as 80 S is composed of 40 S and 60 S subunits.
In prokaryotic cells, it is 70 S type consist up 30 S and 50 S subunits.
In both prokaryote and eukaryotes majority of ribosome is composed up proteins that and the remaining part is ribonucleic acid.
Hence nucleolus and cytoplasm are correct answers.
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