Limiting factors

• What is limiting factors?


  A factor that stops rate from increasing
• Name 3 limiting factors of photosynthesis 


  Carbon dioxide (reactant)

  Temperature(enzyme catalysed reaction)

  Light intensity (Provides energy)
• How does CO2 limit photosynthesis?

  -Rate increases because CO2 concentration increases (the reactor)

  -The rate plateaus even tho CO2 increasing

  -Either temp or light intensity now limiting factor
• How does light intensity limit photosynthesis?


  -Rate increases as light intensity increases

  -As light = energy source for photosynthesis

  -Light intensity increases but the rate plateaus

  -Temp/CO2 concentration = limiting factor
• How does temperature limit photosynthesis?


  -Rate increases as temp increases + enzyme activity increases

  -Optimum temp for enzymes when graph peaks

  -Rate decreases as enzymes start to denature
• What can light intensity be measured using?

  Light meter/inverse square law
• There's a proportional relationship between distance + light intensity


  False (it's inverse)
• Why is the relationship between light intensity+distance inverse? 


  As photons of light become spread over a wider area
• What is light intensity proportional to


  Inverse of distance squared (d^2)
• Give the equation for inverse square law 


  Light intensity = 1/distance^2