Photosynthesis - Biology

    Cards (23)

    • What is the process of photosynthesis
      Plants converting light energy into chemical energy(ATP) through a series of enzyme controlled reactions
    • Where does photosynthesis happen
      Chloroplast 
    • What is transpiration
      The loss of water from the leaves of a plant 
    • The transpiration stream is important because 

      It carries water for photosynthesis, the water carries essential mineral salts dissolved in the solution
    • Water travels up the plant stem through the
      Xylem
    • Water is lost through the
      Stomata by evaporation
    • Water moves into the roots by
      Osmosis
    • What are the use of root hair cells
      Increase the surface area available for water absorption
    • What are the 4 factors that affect the rate of photosynthesis
      Wind speed, Humidity, temperature, surface area 
    • What is the piece of equipment used to observe transpiration  
      A potometer
    • What is the tube used in the potometer called
      Capillary Tube
    • What do we look at in the potometer that tells us the rate of transpiration
      The Air Bubble
    • What is the role of an enzyme
      Speed up chemical reactions
    • What are the two stages of photosynthesis
      Light reactions, Carbon fixation
    • Light Reactions: The light energy from the sun is trapped by chlorophyll in the chloroplast. The raw material water is split into hydrogen and oxygen. Converting light energy into chemical energy which is used to generate ATP. Oxygen is a by-product and released from the cell by diffusion.
    • Carbon Fixation: a series of enzyme-controlled reactions, which use two products from the light reactions stage, these are hydrogen and ATP. Hydrogen is joined with the second raw material of photosynthesis, carbon dioxide which diffuses into the leaf to produce sugar. ATP provides the energy which is required for this reaction to happen. The chemical energy in sugar is available for respiration or the sugar can be converted into other substances, such as:
      A storage carbohydrate: Starch
      A structural carbohydrate: Cellulose
    • What happens to Iodine if put on a plant and starch is present 
      It turns from brown to blue/black
    • What is a limiting factor
      Anything in short supply that prevents photosynthesis occuring at its maximum rate
    • What is the function of the waxy cuticle
      Waxy layer preventing water loss
    • What is the function of the mesophyll
      Cell that contains a lot of chloroplasts
    • What is the function of the stomata 

      Holes that allow gases in and out
    • What is the function of guard cells
      Causes the stomata to open and close
    • What provides structure for the Xylem
      Lignin