Biology 1002B Chapter Notes - Chapter 4: Yellow Arrow, Plastocyanin, Photosystem Ii
13 Oct 2017
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Photosynthesis is the conversion of light energy to chemical energy in the form of sugar and other organic molecules. One can measure the rate of photosynthesis as either the rate at which co2 is consumed or the rate at which o2 is produced or evolved. To see the equation as a redox reaction, divide by 6 to put it in its simplest form. Photosynthesis can be divided into the light reactions and calvin cycle. Conversion of co2 into carbohydrates requires the light reactions and calvin cycle. Light reactions involve the capture of light energy by pigment molecules and the utilization of that energy to synthesize both nadph (nicotinamide adenine dinucleotide phosphate) and atp. Electrons needed to reduce nadp+ to nadph comes from the oxidation of h2o. Calvin cycle involves the electrons and protons carried by nadph and the energy of atp hydrolysis to be used to convert co2 into carbohydrate. Reduction reaction with electrons being added to co2.
