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

29. The structural layout where the hydrophilic sugar-phosphate backbones face the outside and the hydrophobic bases face the inside shows that DNA is

A. Soluble and stable in the aqueous nuclear environment
✓
B. Insoluble in water and restricted to lipid membranes
C. Unstable and prone to spontaneous breakdown
D. Highly acidic throughout its inner core

📝 Explanation

Placing the charged, polar groups on the outside allows DNA to interact favorably with the watery environment of the nucleoplasm.

📖 Additional Information

  • Soluble and stable in the aqueous nuclear environment
  • Insoluble in water and restricted to lipid membranes
  • Unstable and prone to spontaneous breakdown
  • Highly acidic throughout its inner core

Placing the charged, polar groups on the outside allows DNA to interact favorably with the watery environment of the nucleoplasm.

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