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5.某蛋白质分子含有a条肽链,由b个氨基酸组成。如果氨基酸的平均相对分子质量是c,则该蛋白质的相对分子质量以及水解时需要的水的相对分子质量分别是

A.b(c-18)+18a和18(b-a)      B.b(c+18)+18a和18(a + b)

C.b(c-18)-18a和18(a-b)      D.b(c+18)-18a和18(b-a)

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4.①、②、③三个圆分别代表某个概念或某类物质。以下各项中,能构成图示关系的是

A.①细胞分裂、②有丝分裂、③无丝分裂

B.①DNA、②染色体、③染色质

C.①酶、②蛋白质、③激素

D.①核糖核苷酸、②核苷酸、③脱氧核苷酸

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3.一切生物的遗传物质是

A.糖类       B.蛋白质     C.DNA       D.核酸

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2.ATP的结构简式是 A.A-P-P-P    B.A-P-P-P   C.A-P-P-P     D.A-P-P-P

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1.生物体进行生命活动的主要能源物质 A.无机盐      B.水       C.蛋白质     D.糖类

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 第二节:书面表达(满分25分)

上月,你就“早餐与健康”问题在你校进行了调查。请根据下表结果写出调查报告,并提出你自己的看法。

被调查同学的比例
现状
原因
86%
以牛奶、鸡蛋、馒头为主
上午学习繁重,
早餐很有必要
14%
不吃早餐,带水果或零食到校
没胃口,没时间

注意:1、词数为100个左右;

    2、可适当增加细节,以使行文连贯;

    3、首句已给出,但不计入总数;

   4、参考词汇:馒头steamed buns,零食snacks. 胃口appetite

Last month, I had a survey on “Breakfast and Health” in our shool:

___________________________________________________________

____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

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第一节短文改错(共10小题;每小题1分)

Today I was having a PE lesson while I fell down            1._____________

and hurt my foot.I was in greatly pain at that momet,            2._____________

but tried to act as if nothing has happened until the             3._____________

Class was over.. Though I had difficulty walk back to            4._____________

my classroom, I still didn’t tell anyone but even refused           5______________

the offer of help of classmates. As result, the hurt             6______________

in my foot became worse. Now I know I’m wrong. We            7._____________

can tell others our need for help and accept his help.            8______________

Some day we can not help others in return.In this way,           9 ______________

We can get along to each other happily and peacefully.           10.______________

姓名_________  班级__________  学号_______  分数__________

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