单选题:对酶的化学修饰调节特点的叙述,错误的是

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题目内容:
对酶的化学修饰调节特点的叙述,错误的是 A.这类酶均具有无活性和有活性存在形式
B.是由酶催化引起的共价键变化
C.具有放大效应
D.为一种慢速调节方式,难以应急
E.磷酸化与脱磷酸是常见的修饰方式

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