rRNA molecules The counterpart to 16S rRNA in eukaryotes is 18S rRNA Nucleotides:16S (~1500) Nucleotides: -21+ proteins 55 235 (~120)(~2900) 30S subunit ~34← proteins 50S subunit 705 ribosome (c) (a) (b) Figure 11-11 Brock Biology of Microorganisms 11/e 2006 Pearson Prentice Hall,Inc Primary and secondary structure of 16S rRNA of Electron micrograph of E.coli 70S ribosomes from E.colirRNA molecules Electron micrograph of 70S ribosomes from E.coli Primary and secondary structure of 16S rRNA of E. coli The counterpart to 16S rRNA in eukaryotes is 18S rRNA