When DNA is heated, the hydrogen bonds break and allow the two strands of DNA to separate from one another. Which sequence of DNA would be most resistant to heating, and therefore stay double stranded longer?

Question

Quizplus · Accepted Answer

The sequence with the highest number of G-C pairs (C) AGGAGCTC would be most resistant to heating because G-C pairs have three hydrogen bonds compared to A-T pairs, which have only two. This makes G-C rich regions more stable and resistant to denaturation.

When DNA Is Heated, the Hydrogen Bonds Break and Allow