Then, it will move to cytoplasm and attaches to the ribosome (factory to produce protein). tRNA is transfer RNA. If u wan to transport something, u need car or lorry. Then here is also the same! tRNA is function mainly in transferring the mRNA. rRNA is the ribosomal RNA.This is the site where the protein is synthesis. Means, this is the factory to prduce your Nike Air Jordan shoes.t has codons, which match up with the anticodons on tRNA. tRNA is the RNA that bonds to amino acids and transfers them to ribosomes, and mRNA. The reason RNA is used is because the cytoplasm is too damaging to DNA, so RNA is kind of a scapegoat. Hopefully, this helps.