A-LevelBiologyNucleic acids and protein synthesis9700/12 · May/June 2025 · Q251 Mark
The table shows all the possible DNA triplet codes for some amino acids. amino acid: cysteine, DNA triplet code: ACA amino acid: cysteine, DNA triplet code: ACG amino acid: tryptophan, DNA triplet code: ACC amino acid: isoleucine, DNA triplet code: TAA amino acid: isoleucine, DNA triplet code: TAG amino acid: isoleucine, DNA triplet code: TAT amino acid: methionine, DNA triplet code: TAC The amino acid sequence is shown. methionine - isoleucine – cysteine – tryptophan What is the maximum number of different DNA sequences that could produce this amino acid sequence?
A1
B4
C6
D7
✓ Correct answer
C: 6
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