Multiple choice

Which of the following properties helps the DNA in existing like a twisted rope?

  1. Grooves

  2. Base pairing

  3. Sense and antisense

  4. Supercoiling

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

DNA can be twisted like a rope in a process called DNA supercoiling. With DNA in its relaxed state, a strand usually circles the axis of the double helix once every 10.4 base pairs, but if the DNA is twisted the strands become more tightly or more loosely wound.