Topic 6 Part A Cellular Respiration S10 1pp

Topic 6 Part A Cellular Respiration S10 1pp - 1 Cellular...

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Unformatted text preview: 1 Cellular Respiration: Harvesting Chemical Energy Topic 6 Part A Chapter 9 2 Objectives I • To understand the structure of a mitochondrion and how it relates to its function • To know the difference between an autotroph and a heterotroph • To know what cellular respiration is, and the differences between substrate-level phosphorylation, aerobic respiration, anaerobic respiration and fermentation • To know the structure of ATP, how it drives reactions and how it is synthesized • To know what NAD + /NADH and FADH 2 is • To know the stages of glucose catabolism, where they occur and how they are linked – To know the 4 stages and 3 overall changes in glycolysis – To know why NADH is essential, and how it is recycled in cells 3 Objectives II • To understand how pyruvate is oxidized, where this occurs and how this reaction acts as a switching point • To know what the Krebs cycle is, where it occurs, what the two broad steps are and what the products of this cycle are • To know what the components of the electron transport chain are and how they generate ATP • To know what the ATP yield of aerobic respiration is • To know what the major regulatory points in the aerobic respiration pathway are, and to know what regulates the enzymes at these points in the pathway • To know how proteins and fats enter aerobic respiration • To know what fermentation is, the two types of fermentation and when it operates 4 Key Words and Phrases • Mitochondria; outer mitochondrial membrane; inner mitoch- ondrial membrane; inter-membrane space; crista; matrix • Autotroph; heterotroph; digestion; catabolism • Cellular respiration; substrate-level phosphorylation; aerobic respiration; anaerobic respiration; fermentation; • ATP; ATP synthase; NAD + /NADH; FAD/FADH 2 • Glycolysis; pyruvate oxidation; Krebs cycle; electron transport chain • Glucose; pyruvate dehydrogenase; acetyl-CoA; phosphofructokinase; citrate synthetase • Chemiosmosis; ATP yield; H + pump; H + gradient; proton motive force; ATP:ADP ratio • Deamination; β-oxidation; ethanol fermentation; lactic acid fermentation 5 Outline • Cellular Energy Harvest • Cellular Respiration – Glycolysis – Oxidation of Pyruvate – Krebs Cycle – Electron Transport Chain • Regulation of cellular respiration • Catabolism of Protein and Fat • Fermentation 6 OVERVIEW • Living cells require energy from outside sources • Some animals, such as the giant panda, obtain energy by eating plants, and some animals feed on other organisms that eat plants • Energy flows into an ecosystem as sunlight and leaves as heat • Photosynthesis generates O 2 and organic molecules, which are used in cellular respiration • Cells use chemical energy stored in organic molecules to regenerate ATP, which powers work 7 Energy Cycle of Biological Systems 8...
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This note was uploaded on 05/18/2010 for the course BIO 188 taught by Professor Capco during the Spring '08 term at ASU.

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Topic 6 Part A Cellular Respiration S10 1pp - 1 Cellular...

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