BIMM 120 Lecture11.MetabolicDiversityI.050511

BIMM 120 Lecture11.MetabolicDiversityI.050511 - BIMM 120...

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In case you missed it. ..HW#1 and Midterm scores are available on WebCT HW1 reports can be picked up after class today Please swing by my office if you would like to review your MT scantron/exam BIMM 120 Announcements BIMM 120 Announcements
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BIMM 120 BIMM 120 Lecture 11 Lecture 11 Metabolic Diversity I: Fermentation & Respiration Tuesday Cinco de Mayo, 2011 “Chemoorganoheterotrophy Chemoorganoheterotrophy
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* in a redox paring, the half reaction with the more negative E 0 proceeds as an oxidation reduced form oxidized form The The Redox Redox Tower Tower best e- donors (get oxidized) best e - acceptors (get reduced) O 2 /H 2 0 (+0.82) 2 e - CO 2 /glucose (-0.43) 24 e - switch hitters The farther electrons fall electrons fall down the tower down the tower the more energy the more energy released released reduced form oxidized form p a t h o f e l c r n s *
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Vocabulary of Primary Vocabulary of Primary Trophic Trophic Classifications Classifications (vary with sources of carbon, energy and electrons) many organisms are facultative & can employ multiple modes many organisms are facultative & can employ multiple modes CARBON Autotrophs : carbon source is CO 2 (or HCO 3 - ) Heterotrophs : carbon source is reduced organic compounds ----- ENERGY Phototrophs : energy source is light (hv) Chemotrophs : energy source derived from redox reactions involving organic or inorganic compounds ELECTRONS (hydrogen ions) Organotrophs : source of electrons is organic compounds Lithotrophs : source of electrons is inorganic compounds
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Linguistic Mix n Linguistic Mix n Match Game Match Game 1 | Chemo- , Photo- 2 | Organo-, Litho- 3| Auto-, Hetero- A B CARBON ENERGY ELECTRONS -troph _______________ *Chemo organo auto troph – facultative examples exist yet heterotrophy dominates… Chemo organo hetero troph – eat ‘prepared’ food (like us!) Chemo litho auto troph – derive energy solely from inorganic redox reactions (proks only!) Chemo litho hetero troph – example of “mixotrophy”; supplement diet with inorganics *Photo organo auto troph – may occur facultatively but not solely; mixotrophs… Photo organo hetero troph – certain marine microbes, e.g. proteorhodopsin-containing
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BIMM 120 Lecture11.MetabolicDiversityI.050511 - BIMM 120...

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