Chapter 9: Cellular Respiration: Harvesting Chemical Energy Concept 9.1 – Catabolic pathways yield energy by oxidizing organic fuels. • The process of photosynthesis • Three key pathways of respiration • What are catabolic pathways • Define Fermentation: a partial degradation of sugars that occurs without the use of oxygen. • Define Cellular Respiration: in which oxygen is consumed as a reactant along with the organic fuel. • Formula for the catabolic degradation of glucose by cellular respiration (sugar glucose (C 6 H 12 O 6 ), the fuel that cells most often use) • Redox Reactions (Oxidation & Reduction) • Example of Redox reaction. • Coenzyme in cellular respiration NAD+ (As an electron acceptor, NAD + functions as an oxidizing agent during respiration.) • How does NAD + trap electrons from glucose and other organic molecules? • First, in cellular respiration , the hydrogen that reacts with oxygen is derived from organic molecules rather than H 2 . Second, respiration uses an
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