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

11. The vertical distance covered by one complete turn of the standard B-DNA double helix is

A. 0.34 nanometers
B. 2.0 nanometers
C. 3.4 nanometers
✓
D. 20 nanometers

📝 Explanation

One complete helical turn spans a longitudinal length of 3.4 nm (34 A˚) and contains approximately 10 base pairs.

📖 Additional Information

  • 0.34 nanometers
  • 2.0 nanometers
  • 3.4 nanometers
  • 20 nanometers

One complete helical turn spans a longitudinal length of 3.4 nm (34 A˚) and contains approximately 10 base pairs.

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