A2 Genetic Control Of Proteins And Control Of Gene Expression Practice Test

tRNA carries amino acids to the ribosome during translation. Each tRNA is matched to a specific amino acid by a charging enzyme, attaching the amino acid to the tRNA’s end. It also carries an anticodon that pairs with the codon on mRNA, ensuring the correct amino acid is brought in at the right step of protein synthesis. The ribosome uses these charged tRNAs to form peptide bonds and extend the growing polypeptide chain. In contrast, mRNA provides the codon sequence that specifies which amino acids to add, rRNA forms and helps execute the ribosome’s catalytic and structural roles, and DNA stores the genetic information that is transcribed into mRNA. So the carrier of amino acids to the ribosome is the tRNA, specifically the charged form that delivers SAMPLEthe amino acid during translation.