alleryStart learning →How many of the 64 codons signal termination of protein synthesis?
AOne codon
BTwo codons
CThree codons
DFour codons
Answer & Solution
Correct answer: C. Three codons
1. Of the 64 codons, three terminate protein synthesis and release the polypeptide.
2. These three are the nonsense codons, also called stop codons.
3. The remaining 61 codons each specify the addition of an amino acid.
_Source: OpenStax Biology (1st ed., CC BY 4.0), Ch 15 "Genes and Proteins", section 15.1 The Genetic Code_
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