题目

如图为ATP的结构和ATP与ADP相互转化的关系式。下列说法不正确的是 A．图1中的A代表的是腺嘌呤，b、c为高能磷酸键 B．ATP生成ADP时图1中的c键断裂并释放能量 C．ATP与ADP相互转化过程中物质是可逆的，能量不可逆 D．酶1、酶2具有催化作用，不受其他因素的影响   答案：D  ATP是由腺苷和三个磷酸基团组成的，腺苷由一分子的腺嘌呤和一分子的核糖组成；酶具有催化作用，具有高效性，专一性，同时作用的条件要温和，所以要受到温度，酸碱度等其他因素的影响。   完形填空。      How do you get pocket money (零花钱) from your arents? In the western countries,many__ l _  do housework to get pocket money. They usually start to do this  __2_   the age of ten.     Jimmy is seven years old. Now he  _ 3_   the dishes. He can only do this, so he can't get   _4  _ money. But that's all right. He only wants to   _5_   candy.     Jenny is twelve years old. She is   _6_   than Jimmy. She wants to buy many things. They are _ 7_  than candy. So she has to work harder! Now she is washing the car. If she     8    free time , she will cut the grass ,walk the dog or cook dinner.      Doing housework can   _9_  kids learn new things. For example , you can learn how to cook. Ofcourse , your    _10 _ will help you at the beginning. (     )1. A. old men     (     )2. A. at          (     )3. A. is washing  (     )4. A. many        (     )5. A. buy         (     )6. A. old         (     )7. A. interesting (     )8. A. have        (     )9. A. order       (     )10. A. students   B. kid            B. in             B. wash           B. much           B. send           B. older          B. more expensive B. is having      B. help           B. teachers       C. children   C. on         C. will wash  C. a few      C. carry      C clever      C. cheaper    C. has        C. take       C. parents     D. child     D. to        D. washes    D. few       D. to carry  D. younger   D. cheap     D. had       D. to take   D. parent