It is easier to melt DNA richer in AT than GC because
A)it is more heat sensitive.
B)there is one less hydrogen bond in an AT base pair.
C)the helix pitch is longer in AT rich regions.
D)All of the above.

Question

Quizplus · Accepted Answer

The hydrogen bonds between A and T base pairs are weaker than those between G and C, as there is only two hydrogen bonds between A and T, compared to three between G and C. Therefore, DNA sequences rich in AT require less energy to break these weaker hydrogen bonds during the melting process.

It Is Easier to Melt DNA Richer in AT Than