Multiple choice

In prokaryotes, the initiation codon for protein synthesis is normally _____.

  1. UUC

  2. AAG

  3. UGA

  4. AUG

  5. UAC
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

AUG is the universal start codon in both prokaryotes and eukaryotes. It codes for methionine (or N-formylmethionine in prokaryotes) and signals the initiation of protein synthesis. The other options include stop codons (UGA) or codons for different amino acids.

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