Here's a breakdown:

* tRNA structure: Each tRNA molecule has a specific three-nucleotide sequence called an anticodon that recognizes and binds to a complementary codon on the mRNA molecule.

* Amino acid attachment: The other end of the tRNA molecule carries the corresponding amino acid that is specified by the codon.

* Ribosome delivery: The tRNA molecule, carrying its amino acid, travels to the ribosome, where it binds to the mRNA and delivers the amino acid to the growing polypeptide chain.

Think of tRNA as a molecular delivery truck that brings the right "building blocks" (amino acids) to the ribosome, which is the "construction site" for protein synthesis.