1.简单
真核细胞的大部分 DNA 位于哪里?
- A细胞核中
- B溶酶体中
- C细胞壁中
- D细胞膜中
2.简单
What is the single most important way to prevent the spread of infection in hospitals?
- AGiving every patient antibiotics
- BOpening the windows
- CHand hygiene
- DWearing a hair net
3.简单
高尔基体的主要工作是什么?
- A控制哪些基因被开启
- B在细胞分裂前复制 DNA
- C通过细胞呼吸产生 ATP
- D修饰和包装蛋白质
4.中等
原核细胞和真核细胞中都有哪种结构?
- A内质网
- B核糖体
- C细胞核
- D线粒体
5.中等
A seedling is 4 cm tall at week 1, 8 cm at week 2, 12 cm at week 3 and 16 cm at week 4. If the trend continues, how tall will it be at week 6?
- A18 cm
- B20 cm
- C32 cm
- D24 cm
6.中等
Which kind of mutation can be passed on to a person's children?
- AA mutation in a cell that forms eggs or sperm
- BA mutation in a liver cell caused by alcohol
- CA mutation in a skin cell caused by sunlight
- DA mutation in a white blood cell during infection
7.困难
Why do cells get far more ATP from glucose when oxygen is present than when it is absent?
- AWithout oxygen the Krebs cycle runs faster but makes less ATP
- BWithout oxygen only glycolysis runs, giving a net of 2 ATP per glucose
- CWithout oxygen, glucose cannot enter the cell or be broken down at all
- DOxygen itself is converted into ATP in the mitochondria
8.困难
志愿者饮用 0、100 或 200 mg 咖啡因,30 分钟后测量其心率。因变量是什么?
- A志愿者本人
- B30 分钟后的心率
- C30 分钟的等待时间
- D咖啡因的剂量
答案
- 1. A · 细胞核中
- 2. C · Hand hygiene
- 3. D · 修饰和包装蛋白质
- 4. B · 核糖体
- 5. D · 24 cm
- 6. A · A mutation in a cell that forms eggs or sperm
- 7. B · Without oxygen only glycolysis runs, giving a net of 2 ATP per glucose
- 8. B · 30 分钟后的心率
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