4.1.1 Photosynthetic reaction

Cards (6)

  • What happens in photosynthesis?
    1 Light energy is absorbed
    2 By chlorophyll (pigment) in chloroplasts in plant / algal cells
    3 This energy is used to convert carbon dioxide and water into
    glucose (sugar) and oxygen (by-product)
  • What type of reaction is photosynthesis and why?
    Endothermic reaction - energy transferred from environment to chloroplast by light
  • State the word equation
    carbon dioxide + waterglucose + oxygen
  • Why is this statement wrong?
    “Photosynthesis releases energy.”
    Photosynthesis absorbs light energy and uses it to make glucose.
  • Why is this statement wrong?
    “Photosynthesis is the term given to
    respiration in plants.”
    Photosynthesis and respiration are two different processes. Both happen in plant cells.
  • Why is this statement wrong?
    “Plants photosynthesise to make oxygen.”
    Oxygen is made in photosynthesis, but it is only a by-product. The
    aim of photosynthesis is to make glucose.