护理入学考试生物练习卷（附答案）

What is a model in science?

1. AThe control group of a study
2. BA simplified representation of a real system
3. CA single measurement from an experiment
4. DAn exact copy that has no limitations

How does a vaccine protect a person?

1. AIt trains the immune system with a harmless form of a pathogen
2. BIt replaces the person's white blood cells with stronger ones
3. CIt blocks the pathogen from entering the nose
4. DIt kills all bacteria in the body straight away

What is cytokinesis?

1. AThe division of the cytoplasm into two cells
2. BThe copying of DNA before division
3. CThe condensing of chromosomes in prophase
4. DThe pairing of homologous chromosomes

Nerve cells release chemical messengers (neurotransmitters) stored in vesicles. By which process are they released?

1. AExocytosis
2. BPhagocytosis
3. CEndocytosis
4. DOsmosis

细菌通常如何繁殖？

1. A芽殖出病毒
2. B减数分裂
3. C形成种子
4. D二分裂

Why do many plants close their stomata on hot, dry days?

1. ATo reduce water loss
2. BTo take in more carbon dioxide
3. CTo release more oxygen
4. DTo speed up photosynthesis

细菌种群是如何对抗生素产生耐药性的？

1. 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
2. B每个细菌在接触药物后学会了抵抗
3. C患者的免疫系统使细菌产生耐药性
4. D抗生素有意制造出细菌所需的那个突变

A nurse notices that patients who used a new mouthwash had few mouth infections. No other patients were studied. What is most needed before concluding that the mouthwash works?

1. AA larger bottle of the same mouthwash for each patient
2. BA comparable group that does not use the mouthwash
3. CA longer explanation in the report
4. DA survey asking patients if they liked it