Biology for nursing entrance exams worksheet with answers

What is an ecosystem?

1. AThe weather in a particular region
2. BAll the members of one species in an area
3. CA single organism together with all of its organs and tissues
4. DThe living things in an area and their non-living surroundings

Which base is found in RNA but not in DNA?

1. AThymine
2. BUracil
3. CAdenine
4. DGuanine

Which characteristic is shared by all living things?

1. AThey respond to changes in their environment
2. BThey have a backbone and a brain
3. CThey are made of many cells
4. DThey make their own food by photosynthesis

A student switches a light microscope from low power to high power. What happens to the field of view?

1. AIt stays the same size but gets brighter
2. BIt gets larger and brighter
3. CIt gets larger but less detailed
4. DIt gets smaller and usually darker

A greenhouse is warm and brightly lit, but the air has very little carbon dioxide. What is most likely limiting the rate of photosynthesis?

1. AThe light intensity in the greenhouse
2. BThe number of stomata
3. CThe carbon dioxide concentration
4. DThe temperature

Researchers randomly assign patients to receive either a new wound dressing or the standard dressing and compare healing times. What type of study is this?

1. AA case report
2. BAn observational study
3. CA controlled experiment
4. DA survey

Two pea plants that are both AaBb are crossed. The genes are on different chromosomes. What fraction of the offspring is expected to show both recessive traits (aabb)?

1. A3/16
2. B1/4
3. C9/16
4. D1/16

A colour-blind man (XᵇY) has children with a woman who carries the allele (XᴮXᵇ). What is the probability that a daughter is colour-blind?

1. A1/2
2. B1/4
3. C1
4. D0