问题 读图填空题

为了研究在大豆种子萌发和生长过程中糖类和蛋白质的相互关系,某研究小组在25℃、黑暗、无菌、湿润的条件下萌发种子,然后测定在不同时间种子和幼苗中相关物质的含量,结果如图所示

Ⅰ.(1)在观察时间内,图中可溶性糖含量的变化是____________,萌发前营养物质主要储存在大豆种子的________________中,此结构最初由__________发育而来.

(2)上图表明:糖类和蛋白质之间的关系是_________,糖类在____________过程中产生一些中间产物,可以通过___________作用生成相对应的________。

(3)如果在同样条件下继续培养,预测上图曲线的最终变化趋势是_________,其原因是___________。

Ⅱ.在上述定量测定之前,进行了蛋白质含量变化的预测实验,请填充实验原理;判断实验步骤中划线部分是否正确,并更正错误之处;写出实验结果.

(1)实验原理:蛋白质___________其颜色深浅与蛋白质含量成正比

(2)实验步骤:

①.将三份等量大豆种子分别萌发1、5、9天后取出,各加入适量蒸馏水,研碎、提取、定容后离心得到蛋白质制备液;

②.取3支试管,编号1、2、3,分别加入等量的萌发1、5、9天的蛋白质制备液;

③.在上述试管中各加入等量的双缩脲试剂A和B(按比例配制)的混合液,振荡均匀后,a 在沸水浴中加热观察颜色变化a:______________________;b:______________________。

(3)实验结果:___________________________________。

答案

Ⅰ.(1)先增加,然后保持相对稳定   子叶   受精卵

(2)糖类可转换成蛋白质   氧化分解   转氨基   氨基酸

(3)下降,黑暗条件下无光合作用并且呼吸作用消耗有机物

Ⅱ.(1)与双缩脲试剂作用产生紫色反应

(2)判断正误  a:错。更正:双缩脲试剂A混合均匀后,再加入试剂B     b:错。更正:不加热或直接观察

(3)实验结果:1、2、3号试管中颜色依次加深

完形填空

第二部分:语言知识及应用(共两节,满分35分)

第一节:完形填空(共10小题;每小题2分,满分20分)

阅读下面短文, 掌握其大意,然后从每题所给的四个选项(A、B、C和D)中,选出最佳选项,并在答题卡上将该项涂黑。

Once upon a time, there was a boy who would go into the forest and gather food and herbal medicines (草药) with some of his fellows every spring. However, one year, a tiger showed up in the forest and no one dared go into the forest again. One day, the boy’s father became ill, and the family couldn’t afford the (21)  _ that the father needed. The boy decided to try and find some herbal medicines as well as some food in the forest.

It was a perfect sunny day. At first, it was quiet and (22)  _  happened. But later, when the boy bent down to reach one more mushroom, he was suddenly pushed to the ground. A large shadow covered him. He rolled over and looked (23)___  in shock as the tiger said in a deep voice. “You are my (24)__  . Say good-bye to this world.” (25)__  his sick father, the boy knew he couldn’t die. He quickly calmed down and put a mushroom into his mouth, and chewed and swallowed. Then he said, “(26)__ __ you can kill and eat me, but I wish you to know that these mushrooms are deadly poisonous (有毒的). You can eat me, but you will die too. My family will look for me and find you. They will (27)__   your stomach and eat your meat. Your fine skin will carpet the floor of a rich man’s house and your tiger bones will get a good (28)_     in the medicine shops. My family will have enough for a year or more and I will be given a good funeral(葬礼)and long (29)____ .

The tiger hesitated (犹豫). He saw the frightful mushrooms in the basket and (30)____ his appetite (胃口). He slowly walked away. The boy saved his own life with his quick thinking.

A. love                     B. medicine             C. care                        D. doctors

A. anything                 B. everything          C. nothing                    D. something

A. down                  B. out                   C. around                     D. up

A. energy                B. power                C. enemy            D. supper

A. Looking after    B. Thinking of              C. Bringing back         D. Believing in

A. Of course        B. No way                  C. In the beginning        D. In any case

A. feed               B. open                    C. sell                      D. kick

A. price                    B. seller                      C. reward                   D. doctor

A. understood        B. encouraged               C. needed                   D. remembered

A. lost             B. increased                  C. regained                D. forgot

单项选择题