A polypeptide consists of 15 different Amino Acids. How many tRNAs are needed for the synthesis of this polypeptide?

Since each Amino acid is coded for by a codon. Each codon has a tRNA with a corresponding anti- codon. The number of tRNAs needed in the synthesis of any polypeptide corresponds to the number of amino acids. Thus, the number of tRNAs required to make a polypeptide with 15 Amino Acids will be 15.