Final answer:
The transfer RNA (tRNA) is responsible for bringing amino acids to the ribosome for protein synthesis, aligning them according to the mRNA codon sequence.
Step-by-step explanation:
The RNA responsible for bringing the amino acids to the "factory" site for protein formation is transfer RNA (tRNA). During the process of protein synthesis, tRNA plays a crucial role by carrying amino acids to the ribosome, aligning them according to the sequence of codons on the mRNA strand. This ensures that the protein being synthesized has the correct sequence of amino acids. Each tRNA molecule has an anti-codon that pairs with a corresponding codon on the mRNA, allowing for the insertion of the correct amino acid into the growing polypeptide chain.