MDCAT Biology MCQ #991

In the Watson-Crick model of DNA, what is the distance covered by one complete turn of the double helix?

MDCAT Biology MCQ #991

  1. Question 1

    Q1. In the Watson-Crick model of DNA, what is the distance covered by one complete turn of the double helix?

    • A) 0.34 nm
    • B) 2 nm
    • C) 3.4 nm
    • D) 34 nm

    Answer: 3.4 nm

    Explanation: One turn spans 3.4 nm containing ten base pairs; 0.34 nm is tempting as it represents the distance between individual base pairs.