In a PCR reaction, a few seconds at high temperature disrupts the ____ that hold the two strands of DNA together, so every molecule of DNA unwinds and becomes single-stranded.
A) covalent bonds
B) peptide bonds
C) hydrogen bonds
D) lipoproteins
E) DNA ligases

Question

In a PCR reaction, a few seconds at high temperature disrupts the ____ that hold the two strands of DNA together, so every molecule of DNA unwinds and becomes single-stranded.​
A) covalent bonds​
B) ​peptide bonds
C) ​hydrogen bonds
D) ​lipoproteins
E) ​DNA ligases

Quizplus · Accepted Answer

The high temperature in PCR disrupts the hydrogen bonds between the two strands of DNA, causing them to separate and become single-stranded.

In a PCR Reaction, a Few Seconds at High Temperature