Question

Adenine pairs with thymine through:

• A. two hydrogen bonds
• B. one hydrogen bond
• C. three hydrogen bonds
• D. four hydrogen bonds

Answer 1

The correct option is A two hydrogen bonds

Adenine always pairs with thymine through two hydrogen bonds in DNA. Similarly, adenine pairs with uracil through two hydrogen bonds in RNA and guanine always pairs with cytosine through three hydrogen bonds in both the nucleic acids.