Multiple choice

Which of the following best describes the first step in translation?

  1. The amino acids join with a peptide bond

  2. The ribosome moves along the mRNA by one codon

  3. The anticodon of the first tRNA attaches to its mRNA codon

  4. A ribosome attaches to the mRNA
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Translation initiation begins when the small ribosomal subunit binds to the mRNA molecule, followed by the assembly of the complete ribosome. Only after this attachment can the initiator tRNA bind to the start codon.

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