As in all genes, the genes that encode these transcription factors have a triple

Question

As in all genes, the genes that encode these transcription factors have a triplet code. What evidence supports that the code is triplet?

A. When a gene is mutated, the resulting protein is mutated in approximately the same place.

B. When a gene is mutated once or twice, the protein is non-functional. However, if the gene is mutated three times, some functional protein can be produced.

C. Some amino acids are coded by multiple codons.

D. When a gene is mutated, its function can be recovered by adding back the correct supplement.

Explanation / Answer

As in all genes, the genes that encode these transcription factors have a triplet code. This can be supported by the evidence that when a gene is mutated once or twice, the protein is non-functional. However, if the gene is mutated three times, some functional protein can be produced. The silent or missense mutations result in non-functional protein and when another round mutation occurs the protein may become functional. Since gene encodes for a triplet codon, three mutations in either of base of triplet code would result in a functional protein. Option B is correct.

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