Answer:
The rRNA
Explanation:
The rRNA is a major component of the ribosome which is the site of conversion of the codons on the mRNA to amino acids which is brought to the ribosomes by the tRNA. But the rRNA catalyzes formation of the peptide bonds which allows for extension of the polypeptide chain. This since the rRNA is a part of the ribosomes, it mediates the actual conversion of the codons sequence to amino acids sequences.