If a mutation changes a G to an A on one strand of a DNA molecule, with a corresponding change in its complement, which attribute of DNA will most likely be affected?
A) The width of the DNA molecule
B) The length of the DNA molecule
C) The nature of protein‒DNA interactions
D) The number of purines in the double-stranded molecule
E) All of the above are equally likely to be affected.

Question

Quizplus · Accepted Answer

The change in nucleotide sequence will affect the codon sequence on the mRNA, which will alter the amino acid sequence in the protein. This change in protein sequence could affect the way it interacts with DNA, potentially affecting all downstream cellular processes that rely on these protein‒DNA interactions. The other answer choices are not directly related to the nucleotide sequence and are unlikely to be affected by the single nucleotide change described.

If a Mutation Changes a G to an a on One