Question

Which of the following statements regarding DNA is incorrect?

• A. The two strands run antiparallelly
• B. Adenine pairs with thymine through three H-bonds
• C. Purine always pairs with pyrimidine
• D. Guanine pairs with cytosine through three H-bonds

Answer 1

The correct option is B Adenine pairs with thymine through three H-bonds

● In a double-stranded DNA, adenine pairs with thymine through two H-bonds.
● The two strands of DNA run antiparallely and purine always pairs with pyrimidines.