Hydrogen bonds a) play an important role in the solvent properties of water b) are not involved in protein structure c) play a role in the properties of DNA, but not of RNA d) give water a lower boiling point than expected 44. Which of the following molecules will not form hydrogen bonds? a) CH4 b) NH3 c) H2O d) HF 45. A single water molecule can form a maximum of this number of hydrogen bonds: a) 1 b) 2 c) 3 d) 4 e) 5