Which amino acid is specified by the start codon AUG?

Study for the DNA Structure, Replication, Transcription and Translation Test with flashcards and multiple choice questions. Each question offers hints and explanations. Prepare thoroughly and excel in your exam!

Multiple Choice

Which amino acid is specified by the start codon AUG?

Explanation:
AUG is the signal that translation begins and it specifies the first amino acid of the protein. That codon codes for methionine, and a special initiator tRNA brings methionine to the ribosome to start synthesis. In many organisms, the starting amino acid is methionine (and in bacteria it’s often formylated methionine, but the amino acid identity remains methionine). The other amino acids listed are specified by different codons and do not serve as the initiating amino acid at the start of translation.

AUG is the signal that translation begins and it specifies the first amino acid of the protein. That codon codes for methionine, and a special initiator tRNA brings methionine to the ribosome to start synthesis. In many organisms, the starting amino acid is methionine (and in bacteria it’s often formylated methionine, but the amino acid identity remains methionine). The other amino acids listed are specified by different codons and do not serve as the initiating amino acid at the start of translation.

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