Biology for nursing entrance exams worksheet with answers

What is the single most important way to prevent the spread of infection in hospitals?

1. AGiving every patient antibiotics
2. BWearing a hair net
3. CHand hygiene
4. DOpening the windows

What is an adaptation?

1. AA disease that weakens a population
2. BAny mutation that damages a gene
3. CA change an organism makes during its lifetime that it then passes on
4. DAn inherited trait that helps an organism survive in its environment

In the scientific method, what is a hypothesis?

1. AA conclusion that has been proven true
2. BA broad explanation supported by many experiments
3. CA list of the measurements taken
4. DA testable explanation or prediction

Yeast in bread dough breaks down sugar without oxygen. What does it produce?

1. AGlucose and oxygen
2. BLactic acid and carbon dioxide
3. CEthanol and carbon dioxide
4. DOxygen and water

Which type of graph is best for comparing the number of patients with each ABO blood type?

1. AA line graph
2. BA bar graph
3. CA scatter plot
4. DA histogram

Which body system works with the respiratory system to deliver oxygen to body cells?

1. AThe skeletal system
2. BThe urinary system
3. CThe circulatory system
4. DThe digestive system

Pasteur boiled broth in swan-neck flasks. The broth stayed clear until the neck was broken off, when it soon became cloudy. What did this show?

1. AMicrobes come from the air, not from the broth itself
2. BBoiling makes broth produce new microbes
3. CAir alone, without microbes, spoils broth
4. DSwan-neck flasks produce chemicals that kill bacteria

Bacteria grown in heavy nitrogen (¹⁵N) are moved to normal nitrogen (¹⁴N) and allowed to divide once. All their DNA now has a density halfway between heavy and light. Which model of replication does this support?

1. AReplication without a template
2. BReplication by RNA copying
3. CSemiconservative replication
4. DConservative replication