Question

In the structure of DNA, which nucleotide always pairs with adenine?

Answer 1

Thymine always pairs with adenine by double hydrogen bonds.
hope it will help you..

Answer 2

Answer: Thymine pairs with adenine in the structure of DNA.

DNA is a double helical structure which is composed of two complementary strands ( having antiparallel polarity). Four nitrogenous bases are present in the DNA sequence. These are- Adenine, Thymine, Cytosine, and Guanine. These bases form base pairs with the bases in the corresponding strand of DNA according to the Watson and Crick base pairing-

Adenine pairs with Thymine with the help of two hydrogen bonds.

Guanine pairs with Cytosine with the help of three hydrogen bonds.

Thus, the correct answer is Thymine which pairs with Adenine in the DNA.