In the double helix structure of nucleic acids, cytosine hydrogen bonds to 15:10 Biology Chapter 5 In the double helix structure of nucleic acids, cytosine hydrogen bonds to A) deoxyribose. B) ribose. C) adenine. D) thymine. E) guanine. Answer: E) guanine. Learn More : Share this Share on FacebookTweet on TwitterPlus on Google+