Brings anticodon and a particular amino acid to the ribosome?

• A. RNA polymerase
• B. Codon/Triplet
• C. mRNA
• D. tRNA

Answer: (D)

tRNA is the molecule that brings both the anticodon and its amino acid to the ribosome. Each charged tRNA has an amino acid attached and an anticodon loop that pairs with a specific codon on the mRNA. This pairing ensures the correct amino acid is added according to the genetic code. When the charged tRNA binds at the ribosome’s A site, the ribosome transfers the growing polypeptide from the tRNA in the P site to the amino acid on the incoming tRNA, forming a peptide bond. The ribosome then shifts to allow the next codon to be read and another amino acid to be incorporated. In contrast, RNA polymerase is used for transcription, mRNA is the template carrying codons, and a codon is a three-nucleotide unit on mRNA, not a carrier of amino acids.