B1510_module3_9_photosynthesis2class

B1510_module3_9_photosynthesis2class - Anoxygenic...

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Anoxygenic photosynthesis: single reaction center
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Oxygenic photosynthesis: cyanobacteria and chloroplasts have both type I and II reaction centers http://www.life.illinois.edu/govindjee/paper/gov.html
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The type II reaction center in cyanobacteria acquired an oxygen evolving complex
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Oxygenic photosynthesis provides an important fitness advantage over anoxygenic photosynthesis because a) Only cyanobacteria can produce both ATP and reduced electron carriers b) Cyanobacteria can live in any aqueous environment, not dependent on reducing compounds like sulfur or hydrogen c) Only oxygenic photosynthesizers can reduce carbon dioxide to make organic carbon d) All of the above e) None of the above
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Q: The evolution of oxygenic photosynthesis a) Caused mass extinction of anaerobic prokaryotes b) Occurred only once, in cyanobacteria c) Eventually allowed the colonization of land surfaces d) All of the above e) None of the above
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Chapter 10 – Oxygenic Photosynthesis
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Q: Which experiment will produce 18 O 2 ? a. Expt 1 b. Expt 2 c. Both Expt 1 and Expt 2 d. Neither Figure from Purves et al., 7 th ed.
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Evolution of chloroplasts from cyanobacterial endosymbiont? http://evolution.berkeley.edu/evosite/history/endosym.shtml
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Photosynthesis consists of light reactions ( photophosphorylation ) and carbon fixation ( Calvin-Benson cycle ) Campbell & Reece, 7 th ed.
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Noncyclic photophosphorylation (Z-scheme) uses two photosystems: PSI and PSII Light + H 2 O + NADP + + ADP + Pi NADPH + H + + ATP + 1/2O 2 Primary acceptor Primary acceptor Pigment molecules Light P680 e Primary
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B1510_module3_9_photosynthesis2class - Anoxygenic...

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