life before the formation of the three Domains Some organisms can only do

Life before the formation of the three domains some

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life, before the formation of the three Domains… Some organisms can only do _____. Others can do 1 or other under __________ conditions. Extracting energy from complex organic molecules
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© 2019 Glycolysis F 5.9 Ten ___________ reactions Each step is catalyzed by a specific ____________. You do NOT need to know the names and structures of any intermediates in glycolysis or other pathways. 3 _________ reactions form high-energy ATP and NADH molecules. 1 st part: 1 X 6C → 2 X 3C 2 nd part: 2 X 3C → 2 X 3C
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© 2019 Glycolysis: Simplified F 5.8 1 st phase: Invest some energy - use 2 ATP create sugar- phosphate for second phase 2 nd phase: extract some energy by coupling breakdown and oxidation reactions to formation of _____ and ______ Overall: 1 X 6C → 2 X 3C Some energy harvested as ATP & NADH, but MOST is found in the 2 molecules of ______________
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© 2019 Coupling the oxidation of a 3C compound with the reduction of a NAD + electron carrier glyceraldehyde-3-P i + P i 1, 3-bisphosphoglycerate NAD + NADH + H + F 5.9 Step 6 NAD + Coupled reaction – overall exergonic/spontaneous ”Redox” rxn: 2 electrons and 2 H + are transferred from ____ and given to _____ to make NADH + H + Electron ________ = “reducing agent” Electron __________ = “oxidizing agent”
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© 2019 ATP is made by Substrate-Level Phosphorylation (SLP) ATP formation (by itself) = ___________ reaction How to make overall reaction ___________? Enzyme catalyzes reaction that transfers P from Phosphorylation = addition of SOLUTION =
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© 2019 Converting energy in glucose into “bite-size” pieces = useful for life Every Reaction in Glycolysis is Exergonic… F 5.4
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© 2019 1. Not much ATP / NADH is made 2. The cell needs to remove pyruvate 3. The cell needs to restore NAD + Glycolysis = PARTIAL oxidation of glucose Most of the energy of glucose is retained in _______ Can’t just let pyruvate __________ in the cell NAD + is a complex, expensive molecule to make and the cell needs to __________________
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© 2019 Chemoorganotrophs use a variety of metabolic pathways to extract energy from organic molecules after glycolysis is completed : 1. Fermentation Prokaryotes and Eukaryotes 2. Aerobic respiration 3. Anaerobic respiration Some organisms can do more than one of the above.
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  • Spring '14
  • Ng, Topic 5A

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