Sometimes the sequence of DNA gets mutated and an adenine is paired to a cytosine. Why is this interaction unstable?
A)Because the phosphate groups of the two bases repel each other.
B)Because an ionic bond cannot be formed between the two.
C)Because the chemical groups that form hydrogen bonds are in the wrong positions.
D)Because the charges on the bases repel one another.

Question

Quizplus · Accepted Answer

Adenine usually pairs with thymine through hydrogen bonds, while cytosine pairs with guanine through hydrogen bonds in DNA. Adenine and cytosine have different chemical groups that form hydrogen bonds, and their positions are not compatible with each other, leading to instability in the interaction.

Sometimes the Sequence of DNA Gets Mutated and an Adenine