In translation, the first codon always codes for what amino acid?
  1. Alanine
  2. Valine
  3. Proline
  4. Tryptophan
  5. Methionine
Answer: E, In translation, the first codon always codes for methionine. Methionine serves as a signal for translation to commence.

Key Takeaway: Translation is the process that creates protein by using mRNA as a template. Translation is always initiated by the start codon, which codes for methionine. Each codon is a three nucleotide sequence that codes for a specific amino acid. Each new amino acid is bound to the previous amino acid by a peptide bond. This process continues until one of three stop codons is encountered, and this ends the process and a new protein has been synthesized.
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