ribosomal rna is found in the cell at the ribosome.
where is ribosomal rna found in the cell?
the ribosome
18s ribosomal rna





























18s ribosomal rna (abbreviated 18s rrna) is a part of the ribosomal rna. the s in 18s represents svedberg units. 18s rrna is a component of the small eukaryotic ribosomal subunit (40s). 18s rrna is the structural rna for the small component of eukaryotic cytoplasmic ribosomes, and thus one of the basic components of all eukaryotic cells.





























18s rrna is the eukaryotic cytosolic homologue of 16s ribosomal rna in prokaryotes and mitochondria.
18s ribosomal rna
in prokaryotes a small 30s ribosomal subunit contains the 16s ribosomal rna. the large 50s ribosomal subunit contains two rrna species (the 5s and 23s ribosomal rnas).





























bacterial 16s ribosomal rna, 23s ribosomal rna, and 5s rrna genes are typically organized as a co-transcribed operon. there is an internal transcribed spacer between 16s and 23s rrna genes. there may be one or more copies of the operon dispersed in the genome (for example, "escherichia coli" has seven).





























archaea contains either a single rdna operon or multiple copies of the operon.
ribosomal rna