How does the tRNA anticodon interact with the mRNA codon during docking?

How does the tRNA anticodon interact with the mRNA codon during docking?

• A. The codon on mRNA pairs with the anticodon of tRNA using covalent bonds.
• B. The anticodon of the tRNA is complementary to the codon of the mRNA and hydrogen bonds.
• C. tRNA docks randomly with the ribosome without base pairing.
• D. The amino acid attached to tRNA forms bonds with the codon.

Answer: (B)

Base pairing between the tRNA anticodon and the mRNA codon in the ribosome is how docking happens. The anticodon on tRNA is complementary to the codon on mRNA, and they pair through hydrogen bonds in an antiparallel orientation. This specific, noncovalent pairing ensures the correct amino acid is brought to the ribosome for incorporation into the growing protein. Covalent bonding between codon and anticodon would be too rigid, and tRNA docking relies on this reversible base pairing so the cell can check fidelity during translation. The amino acid attached to tRNA doesn’t form bonds with the codon itself; peptide bonds form later between the amino acids as the polypeptide chain grows. Wobble base pairing at the third codon position also allows a single tRNA to recognize multiple codons, but the essential mechanism remains complementary base pairing via hydrogen bonds rather than any covalent interaction or random docking.

Base pairing between the tRNA anticodon and the mRNA codon in the ribosome is how docking happens. The anticodon on tRNA is complementary to the codon on mRNA, and they pair through hydrogen bonds in an antiparallel orientation. This specific, noncovalent pairing ensures the correct amino acid is brought to the ribosome for incorporation into the growing protein. Covalent bonding between codon and anticodon would be too rigid, and tRNA docking relies on this reversible base pairing so the cell can check fidelity during translation. The amino acid attached to tRNA doesn’t form bonds with the codon itself; peptide bonds form later between the amino acids as the polypeptide chain grows. Wobble base pairing at the third codon position also allows a single tRNA to recognize multiple codons, but the essential mechanism remains complementary base pairing via hydrogen bonds rather than any covalent interaction or random docking.