Биология для вступительных экзаменов на сестринские программы: лист заданий с ответами

What does sterilisation mean?

1. AReducing the number of microbes on the skin before an injection
2. BKilling or removing all microorganisms, including spores
3. CKilling only the viruses on a surface
4. DWashing away visible dirt with water

Which organelle breaks down fatty acids and hydrogen peroxide?

1. APeroxisome
2. BCentriole
3. CRibosome
4. DChloroplast

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

1. AAmylase
2. BLigase
3. CHelicase
4. DLipase

What does RNA polymerase do?

1. AIt copies the whole genome before cell division
2. BIt builds an RNA strand from a DNA template
3. CIt builds a protein from an mRNA template
4. DIt removes introns from pre-mRNA

What do nitrogen-fixing bacteria do?

1. AThey release nitrogen gas from dead organisms into the air
2. BThey break down proteins into glucose
3. CThey turn carbon dioxide into sugar
4. DThey convert nitrogen gas into compounds that plants can use

A study finds a positive correlation between hours of exercise and lung capacity. What does this mean?

1. AAs exercise increases, lung capacity tends to increase
2. BThere is no link between the two variables
3. CAs exercise increases, lung capacity tends to decrease
4. DExercise has been proven to cause higher lung capacity

Каково главное преимущество двойного слепого исследования?

1. AИсследование можно завершить без контрольной группы
2. BМожно изучить вдвое больше пациентов
3. CОжидания пациентов и исследователей не могут исказить результаты
4. DИсследователи всегда точно знают, какие пациенты получили настоящее лекарство

У светового микроскопа окуляр 10× и объектив 40×. Каково общее увеличение?

1. A50×
2. B4000×
3. C40×
4. D400×