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6. What are mitochondria used for?
- Storing energy in the cell.
- Releasing energy from the cell.
- Being the powerhouse of the cell.
- Absorbing energy into the cell.
7. What does chloroplast contain?
- Chlorophyll
- Chloroform
- Vacuole
- Cell membrane
8. List 3 uses of glucose in plants.
- Cellulose, making proteins, making structures, storage
- Respiration, cellulose, storage, making proteins
- The nitrogen cycle, chlorophyll, oxygen, making structures
- Respiration, oxidation, storage, making proteins
9. What is a limiting factor of photosynthesis? How?
- Heat; if the reaction is too thermal it will not work
- Enzymes; they become denatured
- Light; it increases the rate greatly
- Sound; it vibrates with the reactant particles to slow the reaction
10. How does temperature increase the rate of diffusion?
- The molecules move best when kept at a constant temperature.
- The molecules are heated and therefore move faster.
- The molecules are frozen and move more to regain heat.
- The particles are frozen and move more to regain heat.
11. What are hypoaccumulators used for?
- Removing harmful minerals from the soil by containing them.
- Removing harmful nitrogen from soil.
- Controlling the amount of harmful minerals by maintaining them.
- Maintaining protein levels.
12. What is osmosis?
- Gas diffuses randomly into an area of higher concentration.
- Water diffuses randomly ínto an area of lower concentration.
- Water diffuses randomly into an area of higher concentration.
- Gas diffuses randomly into an area of lower concentration.
13. What is a hyper-accumulator?
- Takes up a lot of nitrogen.
- Takes up a lot of minerals, including harmful ones.
- Takes up a lot of proteins, discluding harmful ones.
- Takes up a lot of minerals, discluding harmful ones.
14. What organ in a plant exchanges gases?
15. Define diffusion.
- Molecules collide, and eventually spread out from a low concentration into a high concentration.
- Molecules collide, and eventually spread out from a high concentration into a low concentration.
- Particles collide, and eventually spread out from a high concentration into a low concentration.
- Particles repel, and eventually spread out from a high concentration into a lower concentration.
16. What is phosphorus used for?
- Fission
- Photosynthesis
- Absorbing energy
- Active transport
17. What does an increase in carbon dioxide do to the rate of photosynthesis? Why?
- Stops it; reacts with the reactants
- Increases it; more reactants
- Nothing; is not a reactant
- Decreases it; less reactants
18. What is a semi-permeable membrane?
- Lets none of the particles through.
- Lets all particles through.
- Lets some particles through.
- Lets half of the particles through.
19. What is the plant-alternative to diffusion?
- Focused transport
- Active transport
- Active movement
- Rapid transport
20. Which product is 'wasted' in photosynthesis?
- Nitrogen
- Hydrogen
- Glucose
- Oxygen