Biology for nursing entrance exams worksheet with answers

What is the main job of the cell wall in a plant cell?

1. ATo support the cell and stop it from bursting
2. BTo control which genes are switched on in the nucleus
3. CTo release energy from glucose
4. DTo make proteins for the cell

What is a decomposer?

1. AAn organism that breaks down dead material
2. BAn animal that eats only plants
3. CAn animal that hunts other animals
4. DAn organism that makes food from sunlight

What is cell differentiation?

1. AThe process by which DNA is copied
2. BThe process by which cells become specialised
3. CThe process by which a cell divides into two
4. DThe process by which cells die on purpose

In a food chain, producers hold 10 000 units of energy. Roughly how much is passed on to the primary consumers?

1. AAbout 10 000 units
2. BAbout 5000 units
3. CAbout 1000 units
4. DAbout 10 units

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

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

Which process removes carbon dioxide from the atmosphere?

1. APhotosynthesis
2. BBurning fossil fuels
3. CCellular respiration
4. DDecomposition

The rate of an enzyme reaction rises as substrate is added but then levels off, even when more substrate is added. Why?

1. AThe enzyme has been denatured
2. BThe substrate has become an inhibitor
3. CAll the active sites are occupied
4. DThe products have turned back into substrate

Why does cooking oil not mix with water?

1. AOil is denser than water and sinks
2. BOil molecules are polar and repel the charged ends of water molecules
3. CWater molecules are nonpolar and avoid each other
4. DOil molecules are nonpolar and cannot form hydrogen bonds with water