13. In phosphory1 group transfer reactions, the____of the nucleotide serves as an information symbol, channeling the nucleotide to appropriate metabolic activities.
(A) sugar
(B) diphosphate anhydride
(C) sugar-phosphate ester
(D) base
(E) None are true.
答案：99
統計：A:0,B:0,C:0,D:0,E:0
難度：計算中