Which of the Following Structures Does NOT Participate in H-Bond

question 19

Multiple Choice

Which of the following structures does NOT participate in H-bond formation?

• A)the amino group of cytosine,adenine,and guanine
• B)the ring nitrogens at position 3 of pyrimidines and 1 of purines
• C)the carbon double bonds found in the bases
• D)the carbonyl group at position 4 of uracil and thymine,position 2 of cytosine,and position 6 of guanine

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