Ch09 Key Concepts & Vocabulary-Pathways that Harvest Chemical Energy(1)

Ch09 Key Concepts & Vocabulary-Pathways that Harvest Chemical Energy(1)

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Chapter 9: Pathways That Harvest Chemical Energy OVERVIEW Chapter 9 opens with a brief overview of the principles of metabolic pathways, and continues with a presentation of the role of glucose in providing energy and electrons to cells. The events of anaerobic and aerobic respiration are presented including details of glycolysis and the citric acid cycle. After presenting the mitochondrial chemiosmotic mechanism, the energetics of anaerobic metabolism are discussed. Chapter 9 closes with the integration and regulation of metabolic and energy pathways. KEY CONCEPTS 1. The aerobic metabolism of glucose is expressed by the equation: C 6 H 12 O 6 + 6 O 2 → 6 CO 2 + 6 H 2 O + energy This reaction is accomplished in many separate steps so that the energy can be captured as ATP. 2. Redox reactions transfer large amounts of energy. Much of the energy liberated by the oxidation of the reducing agent is captured in the reduction of the oxidizing agent. 3. NAD is a key electron carrier in biological redox reactions. It exists in two forms, one oxidized (NAD + ) and the other reduced (NADH + H + ). 4. Glycolysis is a pathway of ten enzyme-catalyzed reactions, located in the cytosol, in which glucose is split into two pyruvate molecules. Glycolysis provides starting
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This note was uploaded on 11/11/2011 for the course BIOL 101 taught by Professor Staff during the Spring '10 term at Howard.

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Ch09 Key Concepts & Vocabulary-Pathways that Harvest Chemical Energy(1)

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