Lecture 12 Bio Photosynthesis

Lecture 12 Bio Photosynthesis - Lecture 12: Photosynthesis...

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Lecture 12: Photosynthesis Wednesday 10/21/09 Reading Chapter 10 pgs. 185-203
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Life, work, and energy
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Energy flow diagram Life on earth is solar powered!!
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Organisms rely on organic compounds for energy Autotrophs (producers: make organic compounds) Phototrophs (plants, cyanobacteria, diatoms, dinoflagellates) Heterotrophs (consumers: obtain organic compounds from other organisms) Primary Secondary Decomposers Plants: take energy from the sun Carbon dioxide from air Water and minerals from the soil
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Site of photosynthesis Chloroplasts in green parts of plants
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6CO 2 + 6H 2 O --> C 6 H 12 O 6 + 6O 2 oxidation reduction Redox equation for photosynthesis: –CO 2 is reduced (e- added) Water is oxidized (e- removed) Light (solar energy) to chemical energy
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Redox equation for cellular respiration Glucose is oxidized, e - (and H +) removed Oxygen is reduced, e - (and H +) added Energy is released (H = e - and H + ) C 6 H 12 O 6 + 6O 2 6CO 2 + 6H 2 O oxidation reduction
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Why leaves are green: chlorophyll molecules
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molecules called pigments capture the light of specific wavelengths
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This note was uploaded on 11/19/2010 for the course BIOLOGY 93 taught by Professor O during the Spring '08 term at San Diego.

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Lecture 12 Bio Photosynthesis - Lecture 12: Photosynthesis...

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