1.简单
In which form do animals store glucose in the liver and muscles?
- AGlycogen
- BCellulose
- CStarch
- DChitin
2.简单
What is a heterotroph?
- AAn organism that makes its own food by photosynthesis
- BAn organism that gets its food from other organisms
- CAn organism that lives only in water
- DAn organism with no cells
3.简单
Which feature helps a sperm cell carry out its job?
- AA large vacuole for storing water
- BA cell wall for protection
- CA flagellum for swimming
- DChloroplasts for making food
4.中等
How does facilitated diffusion differ from active transport?
- AIt works without any membrane proteins
- BIt needs ATP and moves substances against their gradient
- CIt moves only water and no other substances
- DIt needs no energy and moves substances down their gradient
5.中等
Salivary amylase begins the digestion of which nutrient in the mouth?
- AProtein
- BFat
- CCellulose
- DStarch
6.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
- B24 cm
- C20 cm
- D32 cm
7.困难
细菌种群是如何对抗生素产生耐药性的?
- A少数细菌本来就带有耐药基因,在药物作用下存活并繁殖
- B每个细菌在接触药物后学会了抵抗
- C抗生素有意制造出细菌所需的那个突变
- D患者的免疫系统使细菌产生耐药性
8.困难
血友病是 X 连锁隐性遗传。一位携带者母亲(XᴴXʰ)和一位未患病的父亲(XᴴY)生了一个儿子。他患血友病的概率是多少?
- A1/2
- B1/4
- C0
- D1
答案
- 1. A · Glycogen
- 2. B · An organism that gets its food from other organisms
- 3. C · A flagellum for swimming
- 4. D · It needs no energy and moves substances down their gradient
- 5. D · Starch
- 6. B · 24 cm
- 7. A · 少数细菌本来就带有耐药基因,在药物作用下存活并繁殖
- 8. A · 1/2
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