What type of molecule does tRNA transport to the mRNA?

What type of molecule does tRNA transport to the mRNA?

• A. Nucleotides
• B. Sugars
• C. Lipids
• D. Amino acids

Answer: (D)

In translation, transfer RNA delivers the amino acids—the building blocks of proteins—to the ribosome as it reads the mRNA codons. Each tRNA is charged with a specific amino acid by an aminoacyl-tRNA synthetase, and its anticodon pairs with the corresponding codon on the mRNA, ensuring the correct amino acid is added to the growing polypeptide chain. Once incorporated, the tRNA is released and can be reused after recharging. This cargo—amino acids—differs from nucleotides, sugars, or lipids, which have other roles in nucleic acids, metabolism, or membranes.

In translation, transfer RNA delivers the amino acids—the building blocks of proteins—to the ribosome as it reads the mRNA codons. Each tRNA is charged with a specific amino acid by an aminoacyl-tRNA synthetase, and its anticodon pairs with the corresponding codon on the mRNA, ensuring the correct amino acid is added to the growing polypeptide chain. Once incorporated, the tRNA is released and can be reused after recharging. This cargo—amino acids—differs from nucleotides, sugars, or lipids, which have other roles in nucleic acids, metabolism, or membranes.