Multiple choice

In a DNA, there are ______ weak bond(s) between adenine and thymine and _____ weak bond(s) between guanine and cytosine.

  1. 2; 3

  2. 3; 2

  3. 1; 2

  4. 2; 1
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

In DNA, adenine pairs with thymine through 2 hydrogen bonds, while guanine pairs with cytosine through 3 hydrogen bonds. This difference contributes to DNA stability and the melting temperature of the double helix.

Keep practicing — related questions