Question

what is the function of trna?
carry genetic instructions for building a protein
catalyze the assembly of amino acids into a protein
bring an amino acid to the ribosome

Explanation:

Transfer - RNA (tRNA) is responsible for bringing the appropriate amino - acid to the ribosome during protein synthesis. Messenger RNA (mRNA) carries genetic instructions for building a protein, and ribosomes catalyze the assembly of amino - acids into a protein.

Answer:

bring an amino acid to the ribosome