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Unformatted text preview: donate to an H-bonding interaction. Ex. O-H, or NH 2 A = Adenine N N N H N NH 2 ring N is A, amino group is D Page 1 of 2 CHEM 109C Zhang CLAS, F10 Nucleic Acids - KEY G = Guanine NH N N H N O NH 2 ring NH and amino grp are D, carbonyl O is A C = Cytosine N N H NH 2 O ring N and carbonyl O are A, amino group is D T = Thymine NH N H O O ring NH is D, carbonyl O is A U = Uracil NH N H O O ring NH is D, carbonyl O is A (#10 Why do both T and U specify the incorporation of A? B/c T and U are the same in their interaction with their base pair A, maximum number of H-bonds) 2 H-bonds between A & T or A & U 3 H-bond between G & C 4. I also recommend problems like # 7, 11-14, 23-28 and will go questions on these types of problems when we get back from Thanksgiving. Page 2 of 2...
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