Multiple choice

One-half of a DNA helix is arranged in the order: adenine, guanine, thymine and cytosine. In what order, is the other half of the spiral arranged (starting from the same point)?

  1. Adenine, cytosine, thymine and guanine

  2. Thymine, cytosine, adenine and guanine

  3. Cytosine, thymine, guanine and adenine

  4. Guanine, adenine, cytosine and thymine

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

The correct answer is option (2).