1.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修饰和包装蛋白质
- C通过细胞呼吸产生 ATP
- D在细胞分裂前复制 DNA
2.简单
What does xylem carry in a plant?
- AOxygen from the leaves to the roots
- BSeeds from the flowers to the soil
- CSugars from the leaves to the roots
- DWater and minerals from the roots upward
3.简单
What is a karyotype?
- AA list of all the proteins that a cell makes during its life
- BA map of the organelles inside a cell
- CA diagram of a family's inheritance pattern
- DA picture of a cell's chromosomes arranged in pairs by size
4.中等
两个杂合亲本(Aa × Aa)杂交。预期的基因型比例是多少?
- A1 AA : 2 Aa : 1 aa
- B1 AA : 1 aa
- C2 AA : 1 Aa : 1 aa
- D3 AA : 1 aa
5.中等
实验结果与假设的预测相符。最恰当的结论是什么?
- A该假设在所有情况下都被证明为真
- B再也不需要进一步的实验
- C假设得到支持,但没有被证明
- D该假设现在成了自然定律
6.中等
基因型为 Aa 的植株与 aa 植株杂交。预期后代中有多大比例表现隐性性状?
- A1/4
- B1/2
- C3/4
- D一个也没有
7.困难
一项研究发现,冰淇淋销量较多的城镇溺水事故也较多。最好的结论是什么?
- A溺水导致人们购买冰淇淋
- B数据一定有误,因为这样的联系根本说不通
- C吃冰淇淋导致人们溺水
- D两者相关,也许因为两者都在炎热天气中增加
8.困难
Fresh liver is dropped into hydrogen peroxide and bubbles form quickly. Boiled liver gives no bubbles. What is the best conclusion?
- ABoiled liver contains more hydrogen peroxide than fresh liver
- BThe bubbles are carbon dioxide from respiration
- CHydrogen peroxide is broken down only by heat
- DLiver contains an enzyme that is destroyed by boiling
答案
- 1. B · 修饰和包装蛋白质
- 2. D · Water and minerals from the roots upward
- 3. D · A picture of a cell's chromosomes arranged in pairs by size
- 4. A · 1 AA : 2 Aa : 1 aa
- 5. C · 假设得到支持,但没有被证明
- 6. B · 1/2
- 7. D · 两者相关,也许因为两者都在炎热天气中增加
- 8. D · Liver contains an enzyme that is destroyed by boiling
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