题目内容

急性心肌梗塞病人血清中哪种LDH含量最高

A. LDH1
B. LDH2
C. LDH3
D. LDH4
E. LDH5

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可以做为辅酶传递H+的是

A. TPP
B. FAD
C. FH4
D. CoASH

下列关于酶的Km值的叙述,正确的是

A. 不能反映酶对底物的亲和力
B. 是反应速度达到最大速度时的底物浓度
C. 对同一底物,不同的酶有不同的Km值
D. Km值是酶的特征性常数

关于酶的可逆性共价修饰,正确的是

A. 活性和非活性两种形式在不同酶催化下可以互变
B. 不需要消耗能量
C. 催化互变的酶受激素等因素的控制
D. 最常见的共价修饰是磷酸化和去磷酸化

4. What does Lisa think of her job?It's ____ and she likes it.5. Why did Lisa mention her brother to the man?He also works for IBM Computer Company and Lisa thoughtthey might _.6. Does Jerry know Lisa’s brother? Why?. Jerry has worked in that company for , and Lisa's brother maybe works in another ____.