Point mutations resulting in a single amino acid substitution provided evidence that: Select one: A. The genetic code is a triplet code. B. The genetic code is overlapping. C. The genetic code is not overlapping. D. The genetic code is degenerate. E. tRNAs recognize codons.

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.

Aliasger2709go Aliasger2709go · Answer 2

A change or modification in the single nucleotide base of the genetic material is called a point mutation. It can be either addition, deletion or inversion.

The correct answer is:

Option C. The genetic code is not overlapping.

This can be explained as:

The point mutation in the amino sequence tells that the codons are not overlapping and a single nucleotide is a part of only a single type of codon.

A single nucleotide can't be included in two codons.

The same letters of the bases purines and pyrimidines are not a part of two different triplets.

Therefore, point mutation tells that the genetic code is non-overlapping.

To learn more about point mutations and codons follow the link:

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