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Question
Four triplet codons code for the amino acid valine. Three of them are given below.
GUU GUC GUA
Write the fourth codon.
Solution
GUG
Explanation:
The amino acid valine has four codons: GUU, GUC, GUA, and GUG. GUG is sometimes used as a start codon instead of AUG, which codes for methionine.
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