BIOL 1201 Chapter : Biology 1202 Chapter 9
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Jane b. reece, lisa a. urry, michael l. cain, steven a. wasserman, peter v. minorsky, robert b. jackson. C6h12o6 + 6 o2 6 co2 + 6 h2o + energy (atp + heat) The transfer of electrons during chemical reactions releases energy stored in organic molecules. This released energy is ultimately used to synthesize. Atp becomes oxidized (loses electron) becomes reduced (gains electron) redox reactions oxidation a substance loss of electrons reduction, gains of electrons, or is reduced. During cellular respiration, the fuel (such as glucose) is oxidized, and o2 is reduced. Nad+ functions as an oxidizing agent during cellular respiration. Nadh (the reduced form of nad+) represents stored energy that is tapped to synthesize atp. 2 h+ (a) uncontrolled reaction (b) cellular respiration. A preview: harvesting of energy from glucose has three stages. Glycolysis (breaks down glucose into two molecules of pyruvate) Oxidative phosphorylation (accounts for most of the atp synthesis) Pyruvate oxidation and the citric acid cycle (color-coded salmon)
