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

77. The non-covalent bond type responsible for holding opposing complementary base pairs together horizontally in the DNA core is a

A. Peptide bond
B. Hydrogen bond
✓
C. Ionic bond
D. Glycosidic bond

📝 Explanation

Electrostatic hydrogen bonds form between the partially positive hydrogen atoms and partially negative oxygen or nitrogen atoms of matching bases.

📖 Additional Information

  • Peptide bond
  • Hydrogen bond
  • Ionic bond
  • Glycosidic bond

Electrostatic hydrogen bonds form between the partially positive hydrogen atoms and partially negative oxygen or nitrogen atoms of matching bases.

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