Lecture_10 - Lecture 10 Diversity of Fermentation Reactions...

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Lecture 10 Read: BBOM 11e Sec. 5.11-5.13, 17.10, 17.13-17.14 Diversity of Fermentation Reactions Respiration (Aerobic and Anaerobic)
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There are 2 main needs of growing cells that fermentation must provide. 1. ATP Production 2. Maintenance of redox balance (NAD/NADH) Read: BBOM 11e Sec. 17.19-17.20 => SLP => Fermentation waste products Diversity of Fermentation Reactions This has led to the evolution of many different fermentation pathways among Bacteria
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An organic or inorganic electron donor is oxidized to CO 2 using O 2 ( or an O 2 substitute) as the final electron acceptor What is Respiration? An aerobic or anaerobic catabolic process ATP is produced by an electron transport system (ETS), which generates PMF to form ATP in a process called Oxidative Phosphorylation e.g. C 6 H 12 O 6 + 6 O 2 => 6 CO 2 + 6 H 2 O +/- O 2 Waste products : CO 2 , H 2 O, etc. (and Heat!!) Oxidative Phosphorylation
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Three Important Processes to Remember in Respiration 1. Carbon Flow As an organic compound is oxidized to CO 2, reducing power (NADH, NAD(P)H, FADH) and carbon intermediates are generated (see next slide -- the TCA cycle). The intermediate compounds will be used in biosynthesis. 2. Electron Flow Electrons in a chemical energy source are transferred by the membrane-bound intermediate electron carriers of an ETS to a final electron acceptor (e.g. O 2 , NO 3 , SO 4 ,CO 2 ,…); The electron flow generates PMF.
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