问题
单项选择题
有关非竞争性抑制作用的论述,正确的是
A.不改变酶促反应的最大程度
B.改变表观Km值
C.抑制剂与酶结合后,不影响酶与底物的结合
D.酶与底物、抑制剂可同时结合,但不影响其释放出产物
答案
参考答案:C
有关非竞争性抑制作用的论述,正确的是
A.不改变酶促反应的最大程度
B.改变表观Km值
C.抑制剂与酶结合后,不影响酶与底物的结合
D.酶与底物、抑制剂可同时结合,但不影响其释放出产物
参考答案:C
完形填空。 | |||
A duck(鸭子) and a hen (母鸡) meet on the road. The duck asks the hen, " 1 do you work?" The hen answers , " 2 a farm. " The duck says , Then you are a 3 . " " No, I'm a worker. I make eggs. What 4 you? What do you do?" the hen asks. The duck answers , "Oh, I'm a 5 . " The hen asks, 6 do you teach?" " At a swimming school. " The hen asks again," 7 do you teach?" "I teach swimming. " " Oh , good. I want to 8 the sport. Can you teach me?" "Sorry, I think you can't. "" 9 ?" "Because you are a hen, you will die(死)in the 10 . " | |||
( )1. A. Where ( )2. A. In ( )3. A. worker ( )4. A. for ( )5. A. teacher ( )6. A. When ( )7. A. What ( )8. A. have ( )9. A. How ( )10. A. bed | B. What B. On B. teacher B. with B. student B. Who B. Why B. learn B. What B. floor | C. Which C. At C. farmer C. of C. worker C. How C. When C. teach C. Why C. boat | D. How D. To D. student D. about D. farmer D. Where D. Which D. swim D. Who D. water |