In DNA, pyrimidines are covalently bonded to the pentose sugar. Which one of the following statements is correct?
a. the 1'C of the sugar is covalently bonded to N1 in the pyrimidine ring
b. the 1'C of the sugar is covalently bonded to N9 in the pyrimidine ring
c. the 1'C of the sugar is hydrogen bonded to N9 in the pyrimidine ring
d. the 1'C of the sugar is hydrogen bonded to N1 in the pyrimidine ring
Answer: a. the 1'C of the sugar is covalently bonded to N1 in the pyrimidine ring
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