Which is a point mutation?

1 answer:

8 0

A point mutation is a kind of mutation in RNA or DNA, that is, the genetic substance of the cell, in which one single nucleotide base is deleted, added, or changed. It is a wide term applied for the kind of mutation in which only one nucleotide in the arrangement of the gene is substituted by the other nucleotide.

The point mutations most usually include the substitution of one base with another that alters the complementary base as well in DNA. The term point mutation also involves deletions or insertions of a single pair of the base.

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Explanation:

a) From the table of genetic codes, there are 28 codons that specify more than one amino acid assuming only the first two nucleotides are considered. In these cases, one cannot outrightly specify the amino acid the genetic codes are coding for without knowing the last nucleotide of the codes. <em>For example, UU can be for Phenylalanine or Leucine, CA can be for Histidine or Glutamine, etc. </em>

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