Question

Which of the following statements about stop codons is correct?

Options

• The three stop codons are UUU, UUC, and UUA

• The three stop codons are AUG, UAA, and UAG

• The three stop codons are GUU, GUC, and GUA

• The three stop codons are UAA, UAG, and UGA

Answer 1

Stop codons (also called termination codons) signal the end of protein synthesis. The three stop codons in the genetic code are UAA, UAG, and UGA. These codons do not code for any amino acid and instead signal the ribosome to release the completed polypeptide chain.