rRNA Gene Organization in Bacteria and Eukaryotes

The figure displays the structural organization of ribosomal RNA (rRNA) genes in bacteria and eukaryotes. In bacteria, the rRNA genes are present in a single operon containing 16S, 23S, and 5S rRNA genes. In contrast, eukaryotic rRNA genes are separated into multiple clusters, each containing 18S, 5.8S, and 28S rRNA genes, as well as a separate gene for 5S rRNA. The rRNA genes are transcribed and processed to form mature rRNAs, which are essential components of the ribosome, a molecular machine that synthesizes proteins in all living cells.

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