<P> Compared to their prokaryotic homologs , many of the eukaryotic ribosomal proteins are enlarged by insertions or extensions to the conserved core . Furthermore , several additional proteins are found in the small and large subunits of eukaryotic ribosomes , which do not have prokaryotic homologs . The 40S subunit contains a 18S ribosomal RNA ( abbreviated 18S rRNA ) , which is homologous to the prokaryotic 16S rRNA . The 60S subunit contains a 28S rRNA that is homologous to the prokaryotic 23S ribosomal RNA . In addition , it contains a 5.8 S rRNA that corresponds to the 5 ' end of the 23S rRNA , and a short 5S rRNA . Both 18S and 28S have multiple insertions to the core rRNA fold of their prokaryotic counterparts , which are called expansion segments . For a detailed list of proteins , including archaeal and bacterial homologs please refer to the separate articles on the 40S and 60S subunits . Recent research suggests heterogeneity in the ribosomal composition , i.e. , that the stoichiometry among core ribosomal proteins in wild - type yeast cells and embryonic stem cells depends both on the growth conditions and on the number of ribosomes bound per mRNA . </P>
<P> Compared to their prokaryotic homologs , many of the eukaryotic ribosomal proteins are enlarged by insertions or extensions to the conserved core . Furthermore , several additional proteins are found in the small and large subunits of eukaryotic ribosomes , which do not have prokaryotic homologs . The 40S subunit contains a 18S ribosomal RNA ( abbreviated 18S rRNA ) , which is homologous to the prokaryotic 16S rRNA . The 60S subunit contains a 28S rRNA that is homologous to the prokaryotic 23S ribosomal RNA . In addition , it contains a 5.8 S rRNA that corresponds to the 5 ' end of the 23S rRNA , and a short 5S rRNA . Both 18S and 28S have multiple insertions to the core rRNA fold of their prokaryotic counterparts , which are called expansion segments . For a detailed list of proteins , including archaeal and bacterial homologs please refer to the separate articles on the 40S and 60S subunits . Recent research suggests heterogeneity in the ribosomal composition , i.e. , that the stoichiometry among core ribosomal proteins in wild - type yeast cells and embryonic stem cells depends both on the growth conditions and on the number of ribosomes bound per mRNA . </P>
which of the following rrna types do you need to make up a eukaryotic ribosome
which of the following rrna types do you need to make up a eukaryotic ribosome
18S rRNA 28S rRNA 5.8 S rRNA
18S rRNA 28S rRNA 5.8 S rRNA