Biology for nursing entrance exams worksheet with answers

What is the aim of gene therapy?

1. ATo treat a disease by adding a working copy of a faulty gene
2. BTo give a patient antibiotics through a vein to kill a virus
3. CTo remove all the genes from a patient's cells
4. DTo change the patient's blood type

What do centrioles do in an animal cell?

1. AThey capture light for photosynthesis
2. BThey make lipids for the cell membrane
3. CThey help organise the spindle during cell division
4. DThey store the cell's digestive enzymes until they are needed

What is a karyotype?

1. AA picture of a cell's chromosomes arranged in pairs by size
2. BA diagram of a family's inheritance pattern
3. CA map of the organelles inside a cell
4. DA list of all the proteins that a cell makes during its life

What is the role of cholesterol in animal cell membranes?

1. AIt forms a rigid wall around the cell
2. BIt stores the cell's genetic information
3. CIt keeps membrane fluidity stable as temperature changes
4. DIt carries glucose molecules across the membrane into the cell

Which element is found in all amino acids but not in carbohydrates?

1. ACarbon
2. BHydrogen
3. COxygen
4. DNitrogen

How does facilitated diffusion differ from simple diffusion?

1. AIt moves molecules against their gradient using a pump and ATP
2. BIt uses ATP to move molecules uphill
3. CIt uses channel or carrier proteins but no ATP
4. DIt only moves gases such as oxygen

Fertiliser washes from farmland into a lake. Algae grow rapidly, then die, and later many fish die. What is the main cause of the fish deaths?

1. AThe algae release carbon dioxide that poisons fish
2. BBacteria decomposing the dead algae use up the oxygen
3. CThe fish eat too many algae and become ill
4. DThe fertiliser is directly poisonous to fish

The number of bacteria in a sample rises from 200 to 500. What is the percentage increase?

1. A60%
2. B300%
3. C150%
4. D250%