Post on 26-Mar-2015
IB Biology
Photosynthesis is a chemical reaction Rate can be measured by quantifying
The uptake of reactants: ____________The production of products: _________
6CO2 + 6H2O 6O2 + C6H12O6
6O2 + C6H12O6 6CO2 + 6H2Olight
Temperature, Light Intensity and CO2 concentration all affect the rate of photosynthesis
Note: Temperature also has a limit, as with most enzymatic functions, a broader chart would reveal a bell shaped curve
Rate of Photosynthesis
Light
Inte
nsi
ty
Rate of Photosynthesis
CO
2
Conce
ntr
ati
on
Rate of Photosynthesis
Tem
pera
ture
Thylakoids: large surface area ideal for light absorption (light dependent reactions)
Lumen: Small space inside thylakoids for accumulation of protons
Fluid Stroma for the enzymes of Calvin Cycle
The rate of a physiological activity plotted against wavelength of light.
The absorption of energy by something (chlorophyll, for example) at various wavelengths
So, why are plants green?