Unformatted text preview: PHOTOSYNTHESIS Some organisms—plants and some microbes—have the ability to use light energy to synthesize complex organic substances (sugars) from simple inorganic substances. This is photosynthesis. Carbon dioxide gas is the source of the carbon, so this process is also called carbon fixation. 6 CO 2 +12 H 2 O + LIGHT ENERGY C 6 H 12 O 6 + 6 O 2 + 6 H 2 O Electrons are taken from water and incorporated into sugar. Energy from the sun is used. Two stages: 1. Light reactions—light energy is used to convert ADP and phosphate groups to ATP (photophosphorylation). NADP is reduced to NADPH. 2. Dark (light-independent) reactions—electrons from NADPH plus energy from ATP are used to reduce carbon dioxide to sugar (Calvin-Benson cycle)....
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- Fall '09
- tube, various amino acids, FERMENTATION TESTS Liquid, small test