32. The backbone of nucleic acids consists of
(A) a phosphodiester bond between the 2' and 5' hydroxyI groups of neighboring sugars
(B) a phosphodiester bond between the 3' and 5' hydroxyl groups of neighboring sugars
(C) a glycosidic bond between a pyrimidine and a sugar
(D) a glycosidic bond between a purine and a sugar

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統計： A(0), B(1), C(0), D(0), E(0) #2773382