1.选择题- (共4题)
1.经研究发现某雌雄同株植物的花色由两对等位基因（A，a和 B，b）控制，人对a、B对b完全显性．其中A基因控制紫色色素的合成，B基因控制蓝色色素的合成，当A，B基因同时存在时，他们的转录产物会形成双链分子而影响各自的表达．某同学用纯合亲本P做实验，结果如右所示，请回答以下问题．
3.研究者以大肠杆菌为实验对象，运用同位素示踪技术及密度梯度离心等方法完成蛋白质合成过程的相关研究，实验过程及结果见表．
组别 | 1组 | 2组 | 3组 | 4组 | |
培养条件 | 培养液中氮源（无放射性） | 14NH4Cl | 15NH4Cl | 15NH4Cl | 14NH4Cl |
培养液中碳源（无放射性） | 12C﹣葡萄糖 | 13C﹣葡萄糖 | 13C﹣葡萄糖 | 12C﹣葡萄糖 | |
添加的放射性标记物 | 无 | 无 | 35S﹣氨基酸 | 14C﹣尿嘧啶 | |
操作和检测 | 操作核糖体放射性检测 | 无 | 无 | 有放射性 | 有放射性 |
用温和的方法破碎细菌，然后使用密度梯度离心 | |||||
离心后核糖体位置 | 轻带 | 重带 | ∥ | A | |
2.单项选择- (共10题)
5.
— I want someone to write the composition for me.
— No! It’s a rule in our school that as a student, you _______ depend on yourself.
— No! It’s a rule in our school that as a student, you _______ depend on yourself.
| A．shall | B．will | C．can | D．should |
6.
My uncle___________ until he was forty-five.
| A．married | B．didn’t marry |
| C．was not marrying | D．would marry |
8.
She was depressed and felt totally __________ about the future.
| A．hopeful | B．hopeless | C．anxious | D．unfortunate |
9.
_________ New Year’s Day around the corner, all the salesmen were trying hard to talk customers_________ buying their goods.
| A．On, for | B．With, into | C．In, about | D．At, on |
13.
Recently a terrible earthquake happened in the Southern Asian Area, _______ the people are still suffering.
| A．from their effects | B．of which effects |
| C．of its effects | D．from whose effects |
试卷分析
-
【1】题量占比
选择题:(4道)
单项选择:(10道)
-
【2】：难度分析
1星难题：0
2星难题：0
3星难题：0
4星难题：0
5星难题：0
6星难题：7
7星难题：0
8星难题：3
9星难题：0