How are complementary strands of DNA held together?

1 Answer
Jun 24, 2016

With hydrogen bonds.

Explanation:

The building blocks of DNA are the nucleotides: Adenine (A), Guanine (G), Cytosine (C) and Thymine (T).

Adenine always pairs with Tthymine, they are coupled with two hydrogen bonds.

Cytosine always pairs with Guanine, these are coupled with three hydrogen bonds.

http://en.academic.ru/dic.nsf/enwiki/4574