Question

A point mutation within what functional part of a DNA sequence would be most likely result in the production of a protein that differs from the non-mutated form by only a single amino acid?

a.Promoter

b.5’ or 3’ Untranslated regions

c.Exons

d.Introns

What if the mutation prevented transcription?

What if the mutation prevented the mRNA from exiting thenucleus?

Answer 1

ANSWER :

A point mutation within the exonic functional part of DNA sequence would be most likely result in the production of a protein that differs from the non-mutated form by only a single amino acid, because exons are the coding nucleotide sequences of DNA that code for the synthesis of amino acids in a protein.

If a mutation prevents transcription then m-RNA would not be formed in the nucleus and a mutation that prevents m-RNA from exiting the nucleus to cytoplasm would lead to stop the process of translation and finally proteins never be synthesized in the cytoplasm of cell.