Which event occurs during translation?

• A. DNA replication occurs.
• B. Peptide bonds form between amino acids.
• C. Transcription of tRNA occurs.
• D. Splicing of mRNA occurs.

Answer: (B)

During translation, the ribosome builds a protein by linking amino acids together. The ribosome matches each codon on the mRNA with a corresponding tRNA carrying a specific amino acid, and it catalyzes the formation of a peptide bond between the growing polypeptide and the new amino acid. This peptide-bond formation is the key event, steadily extending the chain to produce the final protein.

DNA replication is a separate process that duplicates the genetic material, not involved in making proteins. Transcription of tRNA occurs earlier to produce tRNA molecules from DNA templates, preparing the tRNAs needed for translation. Splicing of mRNA happens in the nucleus to remove introns and produce mature mRNA before translation can occur.