Multiple choice

The double helix model of Watson and Crick is known as

  1. C-DNA

  2. B-DNA

  3. D-DNA

  4. Z-DNA

  5. -
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In B-DNA, the most common double helical structure, the double helix is right-handed with about 10–10.5 base pairs per turn. In B-DNA, the major groove is wider than the minor groove. Given the difference in widths of the major groove and minor groove, many proteins which bind to B-DNA do so through the wider major groove.

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