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BIO NMDCAT BIOLOGICAL MOLECULES
nmdcat.online June 27, 2026

The most distinctive feature of DNA’s secondary structure that allows for the storage of genetic information is the

A. Alternation of sugar and phosphate groups
B. Sequence of nitrogenous bases along the molecule
✓
C. Coiling of the double helix around histones
D. Presence of a free hydroxyl group at the 3' end

📝 Explanation

While the sugar-phosphate backbone provides structural integrity, genetic information is encoded in the specific linear sequence of the four nitrogenous bases (A, T, G, C). This sequence is the code that dictates protein synthesis and is heritable.

📖 Additional Information

  • Alternation of sugar and phosphate groups
  • Sequence of nitrogenous bases along the molecule
  • Coiling of the double helix around histones
  • Presence of a free hydroxyl group at the 3' end

While the sugar-phosphate backbone provides structural integrity, genetic information is encoded in the specific linear sequence of the four nitrogenous bases (A, T, G, C). This sequence is the code that dictates protein synthesis and is heritable.

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