Photosynthesis

Cards (14)

  • Where does Photosynthesis occur?
    Chloroplasts in the leaves of a plant.
  • What is the name of the green pigment in the leaves?
    Chlorophyll.
  • What type of reaction is photosynthesis?
    Endothermic.
  • What type of energy is used in photosynthesis?
    Light energy.
  • Give the word equation for photosynthesis.
    Carbon dioxide + water -> glucose + oxygen.
  • Give the balanced symbol equation for photosynthesis.
    6CO2 + 6HO -> C6H12O2 + 6O2
  • Define the term limiting factor.
    Anything that limits the rate of a reaction when it is short supply.
  • Give the limiting factors of photosynthesis.
    Temperature.
    Carbon dioxide concentration.
    Light intensity.
    Amount of chlorophyll.
  • Describe how light intensity affects the rate of photosynthesis.
    Increasing carbon dioxide concentration increases the rate of photosynthesis until another factor becomes limiting.
  • Describe how carbon dioxide concentration affects the rate of photosynthesis.
    Increasing carbon dioxide concentration increases the rate of photosynthesis until another factor becomes limiting.
  • Describe how temperature affects the rate of photosynthesis.
    Increasing temperature increases the rate of photosynthesis as the reaction rate increases - at high temperatures enzymes are denatured so the rate of photosynthesis quickly decreases.
  • Give the equation for the inverse square law for light intensity.
    The inverse square law states that light intensity is inversely proportional to the square of the distance from the light source.
    1
    Light intensity ∝ -----------------------------
    (distance from light source)^2
    This graph shows an inverse square relationship.
  • Why are limiting factors important in the economics of growing plants in greenhouses?
    Greenhouses need to produce the maximum rate of photosynthesis whilst making profit.
  • How do plants use the glucose produced in photosynthesis?
    Respiration.
    Convert it into insoluble starch for storage.
    Produce fat or oil for storage.
    Produce cellulose to strengthen cell walls.
    Produce amino acids for protein synthesis.