Originally Posted by smallserenity
RNA polymerase I - pRimary school - rRNA
RNA polymerase II - Middle school - mRNA
RNA polymerase II - Tertiary school - tRNA
Actually, if I am not mistaken they are numbered according to when we use them in protein synthesis. rRNA binds mRNA and then tRNA brings amino acids. I for rRNA, II for mRNA and III for tRNA. That is how I remember it. Although, it is worth noting that 5S rRNA is made by RNA polymerase III (not pol I). Minute detail but pretty important according to Dr. Raymon.