What is the start codon for protein synthesis?

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Prepare for the PLTW Biomedical Science Test. Study with flashcards and multiple choice questions, each question comes with hints and explanations. Get ready for your exam!

Multiple Choice

What is the start codon for protein synthesis?

Explanation:
Protein production begins when the ribosome finds AUG on the mRNA. This signal not only starts translation but also fixes the reading frame for all the following codons. AUG codes for the amino acid methionine and is recognized by the initiator tRNA, which brings methionine to the ribosome to kick off the polypeptide chain. The other codons shown do not initiate translation: one specifies phenylalanine, while the others are stop codons that terminate protein synthesis.

Protein production begins when the ribosome finds AUG on the mRNA. This signal not only starts translation but also fixes the reading frame for all the following codons. AUG codes for the amino acid methionine and is recognized by the initiator tRNA, which brings methionine to the ribosome to kick off the polypeptide chain. The other codons shown do not initiate translation: one specifies phenylalanine, while the others are stop codons that terminate protein synthesis.

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