护理入学考试生物练习卷（附答案）

被认为有生命的最小单位是什么？

1. A组织
2. B分子
3. C原子
4. D细胞

What is a eukaryote?

1. AAn organism made of a single cell without a nucleus
2. BA virus that infects animal cells
3. CAn organism that lives only in extreme heat
4. DAn organism whose cells have a nucleus

What is the main job of the cell wall in a plant cell?

1. ATo control which genes are switched on in the nucleus
2. BTo release energy from glucose
3. CTo make proteins for the cell
4. DTo support the cell and stop it from bursting

What does it mean that a person's blood is Rh negative?

1. ATheir red cells carry extra RhD antigen
2. BTheir red cells lack the RhD antigen
3. CTheir plasma has no antibodies at all
4. DTheir red cells lack the A and B antigens

在脱水缩合反应中发生什么？

1. A加入一个水分子使聚合物分裂
2. B水通过渗透从细胞中被移走
3. C两个单体连接，并释放出一个水分子
4. D细胞干燥并死亡

原核细胞和真核细胞中都有哪种结构？

1. A线粒体
2. B核糖体
3. C细胞核
4. D内质网

Two genes lie very close together on the same chromosome. In a test cross, most offspring look like the parents instead of the expected 1:1:1:1 ratio. Why?

1. AThe genes are linked and are rarely separated by crossing over
2. BA frameshift mutation happened in both genes
3. CThe genes are on different chromosomes and assort independently
4. DBoth genes show incomplete dominance

A pesticide that is not broken down is sprayed on crops. Later, hawks at the top of the food chain have much higher levels of it than the insects. Why?

1. AThe pesticide is broken down faster in insects than in plants
2. BEach predator eats many prey, so the pesticide builds up at each level
3. CHawks make the pesticide in their own bodies
4. DHawks eat the crops directly, so they take in the most pesticide of all