Of the 64 codons, how many are stop codons?

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Study for the DAT Bootcamp Molecular Genetics Test. Enhance your knowledge with flashcards and multiple-choice questions, each offering hints and explanations. Prepare effectively for your exam!

Multiple Choice

Of the 64 codons, how many are stop codons?

Explanation:
In the genetic code, triplet codons formed from four nucleotides give 64 possible sequences. Among these, three do not encode any amino acid but instead signal the ribosome to terminate protein synthesis. Those stop codons are UAA, UAG, and UGA (corresponding DNA sequences TAA, TAG, TGA). The remaining 61 codons specify amino acids (with redundancy), and one codon also serves as the start signal (AUG). So there are three stop codons in the 64 total codons.

In the genetic code, triplet codons formed from four nucleotides give 64 possible sequences. Among these, three do not encode any amino acid but instead signal the ribosome to terminate protein synthesis. Those stop codons are UAA, UAG, and UGA (corresponding DNA sequences TAA, TAG, TGA). The remaining 61 codons specify amino acids (with redundancy), and one codon also serves as the start signal (AUG). So there are three stop codons in the 64 total codons.

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