The parts of the subunits of ribosomes are assembled in the nucleolus while the subunits are assembled into ribosomes in the cytoplasm.
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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