Three of the rRNA molecules are synthesized in the nucleolus , and one is synthesized elsewhere .
Eukaryotic ribosomes contain four different rRNA molecules : 18S , 5.8 S , 28S and 5S rRNA .
Three of the 5S rRNA molecules are synthesized in the nucleolus , and one is synthesized elsewhere .
Eukaryotic ribosomes contain four different rRNA molecules : 18S , 5.8 S , 28S and 5S rRNA .