How many "stop" codons exist in the genetic code?

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Prepare for the Arizona State University BIO181 General Biology I Exam 2. Study with flashcards, multiple choice questions, hints, and explanations to boost your understanding. Ensure success in your biology exam!

The genetic code includes three specific codons that signal the end of protein synthesis, known as "stop" codons. These three codons are UAA, UAG, and UGA. When a ribosome encounters any of these stop codons during translation, it prompts the termination of polypeptide synthesis, allowing the newly formed protein to be released. This function is essential for ensuring that proteins are produced in the correct length and structure, ultimately influencing their functionality in cellular processes. Each stop codon does not correspond to an amino acid but instead serves as a signal to terminate translation. Hence, the correct understanding of the genetic code reveals that there are three distinct stop codons.

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