Point mutations resulting in a single amino acid substitution provided evidence that: Select one: A. The genetic code is a tripl

Question

3 years ago

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Point mutations resulting in a single amino acid substitution provided evidence that: Select one: A. The genetic code is a tripl

et code. B. The genetic code is overlapping. C. The genetic code is not overlapping. D. The genetic code is degenerate. E. tRNAs recognize codons.

Biology

1 answer:

mel-nik [20] · Answer 1 · 2022-08-05T03:31:58+03:00

Answer:

C. The genetic code is not overlapping.

Explanation:

The genetic code is nonoverlapping because each nucleotide can be part of only one codon or 'codeword' during protein synthesis. Therefore, a particular point mutation in the nucleotide sequence can result in only one amino acid modification. A nonoverlapping genetic code indicates that the same letter (i.e., the same nucleotide) can not be used for two different codons. The non-overlapping nature of the genetic code was discovered by Tsugita and Fraenkel-Conrat (1960) by observing point mutations in the tobacco mosaic virus.