1/12/2016 Carbohydrate Catabolism Catabolism:getting materials and energy Learning Objectives Glucose-most common carbohydrate energy Describe the chemical reactions of glycolysis source used by cells. Identify the functions of the pentose Most common pathway to break down glucose phosphate and Entner-Doudoroff pathways is glycolysis Explain the products of the Krebs cycle Carbohydrate metabolism is the breakdown Describe the chemiosmotic model for ATP of carbohydrate molecules to produce generation energy. Compare and contrast aerobic and anaerobic ·Three major pathways respiration 1.Aerobic respiration Describe the chemical reactions of,and list 2.Angerobic respiration some products of,fermentation 3.Fermentation Respiration:series of reactions that convert glucose to CO2 and allows the cell to recover significant amounts of energy Fermentation:when facultative and aerotolerant anaerobes use only the glycolysis scheme to incompletely oxidize glucose Aerobic respiration:When oxygen is used as the final electron acceptor at the end of the respiration scheme to produce H2O. Anaerobic respiration:Does not use molecular oxygen as the final electron acceptor,but uses nitrogen or compounds of nitrogen or sulfur or compounds of sulfur,or other inorganic substances as the final electron acceptor. 101/12/2016 10 Learning Objectives • Describe the chemical reactions of glycolysis Id tif th f ti f th t Carbohydrate Catabolism • Identif y th e functions of th e pentose phosphate and Entner-Doudoroff pathways • Explain the products of the Krebs cycle • Describe the chemiosmotic model for ATP generation • Compare and contrast aerobic and anaerobic respiration • Describe the chemical reactions of, and list some products of, fermentation • Glucose - most common carbohydrate energy source used by cells. M st th t b k d l s Catabolism: getting materials and energy • M ost common pathway t o break down glucose is glycolysis • Carbohydrate metabolism is the breakdown of carbohydrate molecules to produce energy. • Three major pathways 1. Aerobic respiration 2. Anaerobic respiration 3. Fermentation Respiration: series of reactions that convert glucose to CO2 and allows the cell to recover significant amounts of energy Fermentation: when facultative and aerotolerant anaerobes use only the glycolysis scheme to incompletely oxidize glucose Aerobic respiration: When oxygen is used as the final electron acceptor at the end of the respiration scheme to produce H2O. Anaerobic respiration: Does not use molecular oxygen as the final electron acceptor, but uses nitrogen or compounds of nitrogen or sulfur or compounds of sulfur, or other inorganic substances as the final electron acceptor