Multiple choice

The shift of mRNA by 3 nucleotides in order to bring another codon into position in the ribosome is called ______.

  1. translocation

  2. transformation

  3. packaging

  4. transcription

  5. transport

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A Correct answer
Explanation

Translocation is the process where the ribosome moves exactly 3 nucleotides (one codon) along the mRNA after peptide bond formation. This shifts the tRNAs: the deacylated tRNA moves to the E site, the peptidyl-tRNA moves to the P site, and a new codon enters the A site for decoding.