Final answer:
The codon UUA represents the amino acid Leucine, not a stop codon or any other amino acid mentioned in the options.
Step-by-step explanation:
The amino acid represented by the codon UUA is Leucine. In the genetic code, there are 64 possible codons, and only three are stop codons that do not code for any amino acid and signal the end of protein synthesis. These are UAA, UAG, and UGA. Another important codon is AUG, which codes for methionine and serves as the start codon for translation, establishing the reading frame. In the case of codon UUA, it specifically codes for the amino acid Leucine, as indicated in the reference chart provided.