BIOLOGY - PLANT STRUCTURES AND THEIR FUNCTIONS

• can add uma co
• us expensive
• 6.1.6.2.6.3 Photosynthesis
• process called photosynthesis. They are share the prima prof
• in all food webs and food chains
• ha passat
• Photosynthesis occans in plants and ge
• It is an endothermic action, noring Fans ergy than
• increase in
• The equation for phot
• carbon dicaids watar-glucess
• Each carpound has its own chemical symbol
• Carben deside: 00
• Ogen 0,
• Тыва: С.Н.О.
• The rate of the process is affected by a number of factors
• Factors affecting rate of photosynthesis

  • Eactar
  • Temperature
  • Light intensity
  • Carbon dioxide concentration
  • Phil
• With an incase interperstu, be rate of

  photosynthesis increases
• As the wafen is
• cented by enzymes, this end continues
• up to a certain temperature ural the
• encyes begin to denature and thereof
• reaction decreases
• For moet plants, the higher the light
• intensity, the faster the rate of the
• maction as mat photons not topples
• Carbon dicade is also needed to make
• glucose (see equation) As the
• concentration of carbon dioxide increases.
• the rate of reaction increases.
• Any of the fickor dood become a limiting factor. This is an environmental condition
• (such as light intensity) which, in low levels, restricts any increase in the rate of
• photosynthesis Despite increases in other factors (such as temperature or carbon dioxide
• Owww.pacato 0000 PMTE
• 6.5 - Core Practical: Light Intensity and Rate of Photosynthesis
• We can set up a simple experiment to measure the rate of photosynthesis in a plant:

  1. Use the ruler to place the flask and pondweed 15cm from the lamp

  2. Leave the apparatus for around 10 minutes to allow the pondweed to adjust

  3. Connect the gas syringe to the flask and record the change in volume on the syringe after 5 minutes

  4. Move the lamp 10cm further away and measure the volume change again. Repeat

  5. Plot your results on a graph of distance from lamp on the x-axis, and change in gas volume on the y-axis
• 6.6"Higher Only"-Inverse Square Law: Rate of Photosynthesis
• As mentioned above, light insity is directly proportional to the rate of
• photosynthesis. This is because the greater the intensity of sight, the more photons
• ighter hit the chloroplasts in the leat, and the rare photosynthesis can occur