Which amino acid is encoded by the codon AUG?

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Study for the Campbell Biology Concepts and Connections Test. Explore flashcards and multiple-choice questions, complete with hints and explanations. Prepare for your success!

Multiple Choice

Which amino acid is encoded by the codon AUG?

Explanation:
AUG is the codon that signals the start of translation and it codes for methionine. The initiator tRNA brings methionine to the ribosome at this codon to start building the protein. In bacteria, the initiating amino acid is formylmethionine, but it still functions as methionine at the start. Once translation proceeds, internal AUG codons can also specify methionine in the growing chain, though they are not initiation signals. The other amino acids listed are specified by different codons, not AUG.

AUG is the codon that signals the start of translation and it codes for methionine. The initiator tRNA brings methionine to the ribosome at this codon to start building the protein. In bacteria, the initiating amino acid is formylmethionine, but it still functions as methionine at the start. Once translation proceeds, internal AUG codons can also specify methionine in the growing chain, though they are not initiation signals. The other amino acids listed are specified by different codons, not AUG.

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