IB Biology. Photosynthesis is a chemical reaction Rate can be measured by quantifying The uptake of reactants: ____________ The production of products:

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Presentation transcript:

IB Biology

Photosynthesis is a chemical reaction Rate can be measured by quantifying The uptake of reactants: ____________ The production of products: _________ 6CO 2 + 6H 2 O 6O 2 + C 6 H 12 O 6 6O 2 + C 6 H 12 O 6 6CO 2 + 6H 2 O light

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 Intensity Rate of PhotosynthesisCO 2 Concentration Rate of Photosynthesis Temperature

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?