What are the roles of rRNA in protein synthesis?

The synthesis of proteins starts with transcribing the instructions in DNA into mRNA. The mRNA is then carried out of the cell's nucleus into the cytoplasm, specifically into structures called ribosomes. The ribosomes, which contain rRNA, are organelles where protein production occurs. The tRNA transports the amino acids to the ribosomes. read more

Short answer: As important parts of the ribosome building blocks, the role of rRNA in protein synthesis is only indirect. rRNA is short for ribosomal RNA. which together with a large number of ribosomal proteins (rProtein) make up the ribosomes, which have only one role: to synthesize proteins needed by the cell. read more

The role of mRNA in protein synthesis is to transfer the information encoded in the DNA to the cytoplasm. The ribosomes are in the the cytoplasm and there the actual protein creation happens. Thus without the presence of mRNA, the process of protein synthesis would be actually not possible. read more