What percentage of the three base codons that can be made using the standard genetic code are stop codons?
A) 14.1%
B) 18.8%
C) 7.8%
D) 9.4%
E) 4.7%
IMAT 2023 · Question 24
Q24 - The genetic code
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The correct answer is E) 4.7%.
Three positions with four possible bases each gives 4³ = 64 codons. Three of them are stop codons (UAA, UAG, UGA).
3/64 ≈ 4.7%
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