Which molecule assists in translation by bringing amino acids to the ribosomes during protein synthesis?

Which molecule assists in translation by bringing amino acids to the ribosomes during protein synthesis?

• A. tRNA
• B. mRNA
• C. rRNA
• D. siRNA

Answer: (A)

In translation, the adaptor molecule that brings each amino acid to the ribosome is tRNA. It carries a specific amino acid and has an anticodon that base-pairs with the corresponding codon on the mRNA, ensuring the amino acids are added in the correct order. The aminoacyl-tRNA synthetases charge tRNAs with the right amino acids, creating aminoacyl-tRNA. As the ribosome advances along the mRNA, charged tRNAs enter the A site, a peptide bond forms between the growing polypeptide and the new amino acid, and the tRNA exits from the P/E areas for reuse. While mRNA provides the template and rRNA helps form the ribosome and catalyze reactions, and siRNA plays a role in gene silencing, the molecule that directly delivers amino acids to the ribosome for incorporation into protein is tRNA.

In translation, the adaptor molecule that brings each amino acid to the ribosome is tRNA. It carries a specific amino acid and has an anticodon that base-pairs with the corresponding codon on the mRNA, ensuring the amino acids are added in the correct order. The aminoacyl-tRNA synthetases charge tRNAs with the right amino acids, creating aminoacyl-tRNA. As the ribosome advances along the mRNA, charged tRNAs enter the A site, a peptide bond forms between the growing polypeptide and the new amino acid, and the tRNA exits from the P/E areas for reuse. While mRNA provides the template and rRNA helps form the ribosome and catalyze reactions, and siRNA plays a role in gene silencing, the molecule that directly delivers amino acids to the ribosome for incorporation into protein is tRNA.