Photosynthesis160-page20 - (that is make organic compounds...

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Photosynthesis - 20 C 4 and CAM Plants Compared Bacterial Photosynthesis Some bacteria have photosynthetic pigments and a process of photosynthesis. There are some differences, however: Bacterial chlorophyll is different from the chlorophyll of other photosynthetic organisms. Bacteria do a just cyclic photophosphorylation. They can not do photolysis, and do not produce oxygen. The Cyanobacteria, however, have chlorophyll a and photosystem II and perform photosynthesis much the same way as Eukaryotic autotrophs do. They have thylakoid-type invaginations of their plasma membrane. Chemosynthetic Bacteria As mentioned in the introduction to this chapter, some bacteria can use inorganic molecules such as Fe ++ , NH 4 + , S and H to provide energy to "fix" carbon
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Unformatted text preview: (that is make organic compounds from inorganic sources). In the scheme of life, chemosynthesis plays a small part in energy acquisition. Yet the environmental role of chemosynthetic bacteria, such as in the nitrogen cycle, is critical. How Productive is Photosynthesis? It takes 18 ATP and 12 NADPH to make one molecule of glucose. Much of the light energy that hits the surface of plants is not absorbed and not available. And much of the light that hits earth does not hit photosynthetic surfaces of plants. Only about 1 – 3 % of the potential energy of the sun is captured by photosynthesis. C4 plants achieve up to 6% productivity under their ideal conditions....
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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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