Final answer:
Transfer RNA (tRNA) has anticodons that match mRNA codons to ensure that the correct amino acids are added during protein synthesis.
Step-by-step explanation:
The type of RNA that has anticodons to match the codons on an mRNA message is the Transfer RNA (tRNA). tRNA plays a crucial role in translating the genetic code from mRNA into a sequence of amino acids, thereby facilitating protein synthesis. During this process, the anticodon of tRNA pairs with the complementary codon on the mRNA strand to ensure that the correct amino acid is added to the growing polypeptide chain. In contrast, ribosomal RNA (rRNA) is a major component of ribosomes and helps with the alignment of mRNA and ribosomes, including catalyzing the peptide bond formation between amino acids, but it does not have anticodons.