The approximate uniform distance between two strands of B-DNA is

  1. a) 34 Angstrom
  2. b) 18 Angstrom
  3. c) 36 Angstrom
  4. d) 20 Angstrom

Answer: d) 20 Angstrom

Explanation: The B-DNA structure is the most stable form of DNA double helix. The width between two strands is approximately 20 Angstrom. The two strands are coiled in a right-handed fashion. The pitch of the helix is 34 Angstrom.

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