Multiple choice

How does base pairing take place after a tautomeric shift in guanine?

  1. Guanine pairs with cytosine.

  2. Guanine pairs with thymine.

  3. Guanine pairs with adenine.

  4. Guanine forms dimer with guanine.

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

Due to tautomeric shift, the more stable keto form of guanine changes to less stable enol form and pairs with thymine.