Biology for nursing entrance exams worksheet with answers

Which feature helps a sperm cell carry out its job?

1. AA large vacuole for storing water
2. BChloroplasts for making food
3. CA flagellum for swimming
4. DA cell wall for protection

What does the enzyme DNA ligase do?

1. AIt joins pieces of DNA together
2. BIt makes RNA from a DNA template
3. CIt cuts DNA at specific sites
4. DIt unwinds the DNA double helix

According to the cell theory, where do new cells come from?

1. AFrom minerals in food
2. BFrom cells that already exist
3. CFrom viruses that enter the body
4. DFrom non-living matter in the body

What happens in the Calvin cycle of photosynthesis?

1. ACO₂ is built into sugar using ATP and NADPH
2. BLight is absorbed by chlorophyll
3. CWater is split to release oxygen
4. DGlucose is broken down to release energy

What does Mendel's law of segregation state?

1. AGenes on different chromosomes are always inherited together
2. BDominant alleles are more common in a population than recessive ones
3. CEach gamete receives both alleles of every gene
4. DThe two alleles of a gene separate so each gamete gets only one

The genetic code is described as nearly universal. What does this mean?

1. AThe same codons mean the same amino acids in nearly all organisms
2. BAll organisms have exactly the same genes
3. CAll organisms have the same number of chromosomes in their cells
4. DEvery cell in the body makes the same proteins

Which type of graph is best for showing how a patient's temperature changes over 24 hours?

1. AA food web
2. BA line graph
3. CA pie chart
4. DA Punnett square

A drug lowered blood pressure in a study of 20 men aged 40 to 50. Why might the result not apply to women over 70?

1. AThe sample did not represent that group
2. BBlood pressure cannot be measured in older women
3. CThe study had a dependent variable
4. DThe results were too precise to be trusted