Photosynthesis160-page2

Photosynthesis160-page2 - carbohydrate molecules that form...

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Photosynthesis - 2 Photosynthesis involves two stages, occurring in separate locations within chloroplasts. In the light-dependent reactions of photosynthesis, light energy is transformed into chemical energy in the form of ATP and the energy transfer molecule NADPH in a series of oxidation-reduction reactions that transfer electrons and hydrogen from water to the energy transfer molecule NADP + , a coenzyme. The light-dependent reactions are known as photophosphorylations, because they involve producing ATP. They take place on the thylakoid membranes of the grana of the chloroplasts. In the light-independent reactions or Calvin-Benson cycle (or more simply, the Calvin cycle) the energy from the light reactions is used to manufacture
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Unformatted text preview: carbohydrate molecules that form glucose. These reactions occur in the stroma of the chloroplast and utilize enzyme catalysts. The overall chemical equation for photosynthesis is: Chlorophyll 6CO 2 + 12H 2 O + energy ± C 6 H 12 O 6 + 6H 2 O + 6O 2 Chlorophyll (Carbon dioxide + water + light energy ------> glucose + water + oxygen) In order to do photosynthesis, water, CO 2 , chlorophyll and light energy must be available, along with the energy transfer molecules. We shall briefly look at each of these requirements before we discuss just how this process of photosynthesis works. Note: ATP/ADP and NADPH/NADP + constantly cycle between light reactions to the Calvin Cycle....
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This note was uploaded on 12/29/2011 for the course BIO 151 taught by Professor Edwards during the Spring '10 term at SUNY Stony Brook.

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