14. Compounds that generate nitrous acid (such as nitrites, nitrates, and nitrosamines) change DNA molecules by:...

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14. Compounds that generate nitrous acid (such as nitrites, nitrates, and nitrosamines) change DNA molecules by: a. breakage of phosphodiesterbonds. b. deamination of bases. c. depurination. d. formation of thymine dimers. e. transformation of A → T. 15. What is the difference between a nucleoside and a nucleotide? 16. Draw the structure of your favorite purine-pyrimidine base pair as found in the Watson- Crick double-helical structure of DNA. Include all hydrogen bonds. 17. Shown below is the structure of _ Draw the structure of its canonical base pair and mark which atoms participate in hydrogen bonds. Draw and name the (deoxy) nucleoside corresponding to this base. 14. Compounds that generate nitrous acid (such as nitrites, nitrates, and nitrosamines) change DNA molecules by: a. breakage of phosphodiesterbonds. b. deamination of bases. c. depurination. d. formation of thymine dimers. e. transformation of A → T. 15. What is the difference between a nucleoside and a nucleotide? 16. Draw the structure of your favorite purine-pyrimidine base pair as found in the Watson- Crick double-helical structure of DNA. Include all hydrogen bonds. 17. Shown below is the structure of _ Draw the structure of its canonical base pair and mark which atoms participate in hydrogen bonds. Draw and name the (deoxy) nucleoside corresponding to this base.