题目内容

在体内能分解为β-氨基异丁酸的核苷酸是:

A. CMP
B. AMP
C. dTMP
D. UMP
E. IMP

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体内进行嘌呤核苷酸补救合成的主要组织是

A. 脑
B. 小肠组织
C. 肝
D. 骨髓

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