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Unformatted text preview: ight C6H12O6 + 6O2 4. C4, CAM Clicker Question
The 2008 Nobel Prize for Physiology or Medicine was awarded today. The award was for research on what subject ? Overview of Photosynthesis
Light reaction light energy is captured by pigments electrons are excited electron energy is harvested by redox reactions protons are pumped across a membrane protons move down gradient to make ATP Dark reaction ATP and electron energy in NADPH are used to fix carbon from CO2 into a 3 carbon (C3) sugar A) genetic engineering B) viruses C) stem cells D) heart disease E) Alzheimer's disease Mesophyll cell
40-50 per cell Action spectrum of photosynthesis demonstrated by T.W. Engelmann's experiment in 1883
Filament of alga alga
400 500 600 700 Wavelength of light (nm)
Engelmann`s experiment. Theodor W. Engelmann (1883) illuminated a living filamentous alga with light from a prism, exposing different segments of the alga to different wavelengths. Aerobic bacteria, which concentrate near oxygen sources using chemotaxis, aggregate in the regions of the microscope slide releasing the most O2 Bacteria congregated in greatest numbers around the parts of the alga illuminated with violet-b...
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- Fall '07