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BIO NMDCAT Structure of DNA
nmdcat.online July 3, 2026

44. The thermodynamic stability of the DNA double helix is disrupted during the laboratory process of denaturation (melting), which breaks

A. The covalent phosphodiester bonds
B. The non-covalent hydrogen bonds between bases
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C. The N-glycosidic linkages of the sugar rings
D. The peptide bonds of the structural framework

📝 Explanation

Heating a DNA sample provides enough thermal energy to break the hydrogen bonds and base-stacking interactions, separating the strands.

📖 Additional Information

  • The covalent phosphodiester bonds
  • The non-covalent hydrogen bonds between bases
  • The N-glycosidic linkages of the sugar rings
  • The peptide bonds of the structural framework

Heating a DNA sample provides enough thermal energy to break the hydrogen bonds and base-stacking interactions, separating the strands.

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