Now in eukaryotic cells our eukaryotic mRNA is usually used to synthesize a single protein. But in prokaryotic organisms a single mRNA molecule can be used to synthesize many different proteins. Now let's move on to the second type of RNA known as rRNA which stands for ribosomal RNA. Now ribosomal RNA is synthesized in a specific section of the nucleus known as the nucleolus. And once we synthesize our rRNA from the DNA that rRNA can transfer into the cytoplasm and it can combine with special types of proteins to form the ribosomes. So we see that ribosomal RNA are specialized RNA molecules that combine with proteins to form ribosomes.