Chapter 8 Glycolysis and cellular Respiration

Chapter 8 Glycolysis and cellular Respiration - Chapter 8...

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Chapter 8 Harvesting Energy From Food: Glycolysis and Cellular Respiration I. Energy flows through ecosystems while the chemicals within an ecosystem are recycled. II. Glycolysis and cellular respiration a. We break down the glucose to CO 2 and energy b. Glucose i. Respiration is: the romaval of energy from organic molecules and storing it in ATP ii. Energy is released when the bond is broken ATP iii. C6H12O6+6O2 6 CO2 + 6H2O+Energy III. Glycolysis harvests chemical energy by breaking down glucose to pyruvate a. Glyco=sugar b. Lysis=to break apart c. Gylcolysis is a catabolic pathway during which a six-carbon glucose is split into two three-carbon sugars, which are then rearranged by a stepwise process that produces two pyruvic acid molecules. d. A multi-step pathway that takes place in the cytoplasm e. Splits glucose to pyruvate f. Occurs with or without O 2 g. The reactions of glycolysis occur in two phases i. Glucose activation phase 1. Uses cellular ATP to phosphorylate (adds a phosphate group to) the glycolysis intermediates 2. Costs two ATP molecules per glucose ii. Energy harvest phase 1. Produces ATP 2. Yields 4 ATP molecules per glucose 3. 2 molecules of NADH per glucose IV. Fermentation a. If there is no oxygen present then the pyruvic acid molecules from glycolysis go through fermentation b. Can be anaerobic (i.e., take place without O
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Chapter 8 Glycolysis and cellular Respiration - Chapter 8...

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