WBCS.LIVE practice question

One turn of DNA helix measures

Solve this multiple-choice question and check the correct answer with its explanation below.

Answer options

  1. 34 A°
  2. 3.4 A°
  3. 24 A°
  4. 44 A°

Correct answer and explanation

Correct answer: 34 A°

Explanation: ✅ Correct Answer: A) 34 A° 📚 Explanation: The DNA double helix structure, as described by Watson and Crick, has a very precise geometry. One full turn (or 360-degree rotation) of the helix measures exactly 34 Angstroms (A°) in length. This turn typically contains 10.5 base pairs, with each pair separated by about 3.4 A°.