Photosynthesis

Photosynthesis - PHOTOSYNTHESIS Where did the carbon come...

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PHOTOSYNTHESIS
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PHOTOSYNTHESIS A direct source of free energy and reduced C in: ! all higher plants ! many primitive plants and protists (all algae, large and small) ! some marine animals that take up algae into their cells ! some prokaryotes (cyanobacteria, green and purple bacteria) An indirect source of free energy and reduced C in: ! animals ! fungi ! non-photosynthetic protists and bacteria ! anything that eats or parasitizes photosynthetic organisms Where did the carbon come from? Where did the energy come from?
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Consider light reactions and light-independent reactions separately
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Focus on the light reactions
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Light capture: conversion of light energy to chemical energy The main pigment of photosynthesis is chlorophyll ! Planar ring ! Conjugated double bonds ! Mg in center ! Phytol tail
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Light ! Different wavelengths ! Different colors ! Different energies per quantum (photon) E/photon (kcal/mol) 72 52 41
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Atoms/molecules ! Different structures ! Different electron orbitals ! Different energies per orbital jump
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This note was uploaded on 06/18/2010 for the course BIS 103 taught by Professor Abel during the Spring '08 term at UC Davis.

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Photosynthesis - PHOTOSYNTHESIS Where did the carbon come...

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