what are the three types of rna and what do they do
1 rRNA is located in the cytoplasm of a cell, where ribosomes are found. 2  rRNA directs the translation of mRNA into proteins. 3  tRNA or Transfer RNA. 4  Like rRNA, tRNA is located in the cellular cytoplasm and is involved in protein synthesis.nswer: There are actually several types of ribonucleic acid or RNA, but most RNA falls into one of three categories: 1  mRNA or Messenger RNA. 2  mRNA transcribes the genetic code from DNA into a form that can be read and used to make proteins.