Photosynthesis

Cards (25)

  • What process must a plant carry out to grow and survive?
    Photosynthesis
  • Where does photosynthesis take place in a plant?
    In the leaves, specifically in chloroplasts
  • What pigment in chloroplasts absorbs light?
    Chlorophyll
  • What does chlorophyll absorb from the environment?
    Light energy
  • What are the reactants used in photosynthesis?
    Carbon dioxide and water
  • What is the chemical equation for photosynthesis?
    6 CO2 + 6 H2O → C6H12O6 + 6 O2
  • Why is light written above the reaction line in the photosynthesis equation?
    Because the reaction requires light energy
  • What type of reaction is photosynthesis classified as?
    Endothermic reaction
  • How is energy transferred to chloroplasts during photosynthesis?
    By light from the environment
  • How does carbon dioxide enter the leaves?
    Through the stomata
  • How is water transported to the leaves?
    Via the xylem from the roots
  • What is the primary product that plants want from photosynthesis?
    Glucose
  • What do plants sometimes use the oxygen produced in photosynthesis for?
    For respiration
  • What are the five main uses of glucose in plants?
    Respiration, cellulose, starch, amino acids, oils
  • How does glucose function in plant respiration?
    It releases energy when broken apart
  • What is cellulose made from?
    Combined glucose molecules
  • What is the purpose of starch in plants?
    Long-term storage of glucose
  • Why do plants store starch instead of glucose?
    Starch is more compact and insoluble
  • When do plants typically break down starch to glucose?
    When photosynthesis is low, like at night
  • How do plants make amino acids?
    By combining glucose with nitrate ions
  • What do plants use amino acids to produce?
    Proteins
  • What is the final use of glucose mentioned in the material?
    Making oils and fats
  • How does the growth rate of plants relate to photosynthesis?
    It depends on the rate of photosynthesis
  • What factors affect the rate of photosynthesis?
    • Light intensity
    • Temperature
    • Carbon dioxide concentration
    • Amount of chlorophyll
  • What resources can be found on the Cognito website?
    • Videos
    • Questions
    • Flashcards
    • Exam style questions
    • Past papers
    • Progress tracking