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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?

  • Leaves
  • Roots
  • Stem
  • Petals

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