12. Among the three binding sites for tRNA in ribosomes, the P-site: (A) is the binding site for the aminoacylated-tRNA. (B) is the binding site for the tRNA that is released. (C) holds the tRNA linked to the growing polypeptide chain. (D) is the first location to which the t-RNA binds during the protein synthesis process. (E) moves the tRNA to the E-site when a stop codon is reached.