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

32. The physical explanation for why the two strands of a DNA molecule can separate easily during replication and transcription is that

A. The backbones are made of weak ionic bonds
B. The strands are held together horizontally by weak hydrogen bonds
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C. The molecule is wrapped tightly around nuclear lipids
D. Enzymes cut the covalent bonds of the sugar rings

📝 Explanation

Hydrogen bonds are weak non-covalent interactions, allowing the twin strands to unzip easily when driven by specialized enzymes.

📖 Additional Information

  • The backbones are made of weak ionic bonds
  • The strands are held together horizontally by weak hydrogen bonds
  • The molecule is wrapped tightly around nuclear lipids
  • Enzymes cut the covalent bonds of the sugar rings

Hydrogen bonds are weak non-covalent interactions, allowing the twin strands to unzip easily when driven by specialized enzymes.

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