Question

Which of the following is not a termination codon?

• A. UAG
• B. UGA
• C. AUG
• D. UAA

Hint:

Remember: \textbf{UAA, UAG, UGA} = Stop codons; \textbf{AUG} = Start codon.

Answer 1

The Correct Option is C

Step 1: Recall stop codons.
There are three termination (stop) codons in the genetic code: UAG, UAA, and UGA.
Step 2: Function of AUG.
AUG is not a termination codon. It is the initiation/start codon, which codes for Methionine and signals the beginning of protein synthesis.
Step 3: Conclusion.
Thus, the codon which is not a termination codon is AUG.