Now remember, there are three different types of RNA molecules that we should be aware of and each one of these RNA molecules serves its own specific function. Now let's recall what these RNA molecules are and what their function is and let's begin with the messenger RNA. So the messenger RNA, also known as the mRNA is basically the molecule that carries the genetic information from the nucleus into the cytoplasm of the cell and it's the mRNA molecule that is used as a template by the ribosomes to synthesize our polypeptide chain, our protein. Now the second type of RNA molecule that we should be aware of is the ribosomal RNA or rRNA. Now rRNA is synthesized in the nucleolus of the nucleus of the cell and once synthesized it travels into the cytoplasm through the nuclear pores of the nuclear membrane of the cell. Now basically the rRNA is itself a constituent of the ribosomes.