护理入学考试生物练习卷（附答案）

蛋白质由氨基酸在哪种结构上装配而成？

1. A溶酶体
2. B液泡
3. C核糖体
4. D中心粒

Which definition of a species is most often used for animals?

1. AAll the animals that eat the same food
2. BAll of the different organisms that live together in one area
3. CA group that can interbreed and have fertile offspring
4. DAny organisms that look alike

Which enzyme unwinds the DNA double helix and separates the two strands for copying?

1. ALipase
2. BLigase
3. CAmylase
4. DHelicase

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？

1. A1/2
2. B1/4
3. C3/4
4. D一个也没有

What is a bacterial endospore?

1. AA hair-like structure used to swim towards food
2. BA reproductive cell that bacteria use to make new colonies quickly
3. CA tough, dormant form that survives heat, drying and many disinfectants
4. DA small ring of DNA that carries antibiotic resistance genes

正常的人类卵细胞含有多少条染色体？

1. A92
2. B22
3. C23
4. D46

Why do phospholipids arrange themselves into a double layer in water?

1. AThey are fully soluble in water
2. BTheir heads are hydrophilic and their tails are hydrophobic
3. CThey carry a strong positive charge on both ends
4. DTheir heads are hydrophobic and their tails are hydrophilic

During the Industrial Revolution, soot darkened tree trunks in parts of England, and dark peppered moths became more common than pale ones. What best explains this?

1. AThe moths chose to become dark to hide
2. BDark moths were produced by the polluted air
3. CBirds found and ate fewer dark moths on the dark trunks
4. DThe soot settled on the pale moths and slowly turned them dark