题目内容

治疗痛风有效的别嘌呤醇可以抑制

A. 黄嘌呤氧化酶
B. 腺苷脱氢酶
C. 尿酸氧化酶
D. 鸟嘌呤氧化酶

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PRPP酰胺转移酶催化

A. 从R-5′-P生成PRPP
B. 从甘氨酸合成嘧啶环
C. 从PRPP合成磷酸核糖胺
D. 从IMP生成AMP

关于嘌呤核苷酸合成的错误叙述是

A. 脑、骨髓只进行补救合成
B. 一碳单位、CO2是嘌呤合成的原料
C. 肝组织进行从头合成途径
D. 天冬酰胺、谷氨酰胺是从头合成的原料

有关嘌呤核苷酸的合成，错误的叙述是

A. 由Asp提供氨基使IMP生成AMP
B. 由Asn提供氨基使IMP生成GMP
C. 由G1n提供氨基使XMP生成GMP
D. IMP是GMP、AMP的前体

Global trade has been around for centuries. In the past, the corporations and countries that benefited from global trade were largely content to treat vast parts of the world as places to _____________.Most foreign investment was between relatively _. U.S technology, companies and money was often _______________ of this movement.