问题
单项选择题 A1型题
关于限速酶错误的说法是（）
A.常位于代谢途径的第一个反应
B.代谢途径中限速酶的活性最高，对整个代谢途径的流量起决定作用
C.受激素调节的酶常是限速酶
D.如一代谢物有几条途径，则在分叉点的第一个反应常是其所在部位
E.常是变构酶
答案
参考答案：B
搜题请搜索小程序“爱下问搜题”
关于限速酶错误的说法是（）
A.常位于代谢途径的第一个反应
B.代谢途径中限速酶的活性最高，对整个代谢途径的流量起决定作用
C.受激素调节的酶常是限速酶
D.如一代谢物有几条途径，则在分叉点的第一个反应常是其所在部位
E.常是变构酶
参考答案：B
用方框中所给词语的适当形式填空，使短文正确通顺，连贯（每个词限用一次）
Mike is only six 1 old and he doesn’t like soap( 肥皂) or water. Every day his mother 2 to him, “ Mike, your hands 3 very dirty（脏）. 4 and wash them.” Mike only puts his hands 5 the water for some seconds( 秒) ,and then takes them 6 . He doesn’t really wash them well. One day, Mike’s uncle comes to 7 Mike’s parents, and brings him some soap. His son is seven and he doesn’t like soap or water, either（也）. The two 8 play outside. Mike looks 9 the other boy’s hands and says, “ My hands are dirty and ___10___ hands are dirty, too. ” |
