问题
单项选择题 B1型题
LDH1和LDH5分别在心肌和骨骼肌中的作用（）。
A.酶原激活作用
B.别构调节作用
C.共价修饰调节
D.同工酶的作用
E.酶含量的调节
答案
参考答案：D
解析：同工酶指催化相同的化学反应而酶的分子结构与理化性质甚至免疫学活性都不同的一组酶。同工酶存在于同一种属或同一个体的不同组织或同一组织的同一细胞中，对代谢的调节有重要意义。
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LDH1和LDH5分别在心肌和骨骼肌中的作用（）。
A.酶原激活作用
B.别构调节作用
C.共价修饰调节
D.同工酶的作用
E.酶含量的调节
参考答案：D
解析：同工酶指催化相同的化学反应而酶的分子结构与理化性质甚至免疫学活性都不同的一组酶。同工酶存在于同一种属或同一个体的不同组织或同一组织的同一细胞中，对代谢的调节有重要意义。
| 完形填空。 | |||
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