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Chapter 9: Cellular Respiration Harvesting Chemical Energy Flashcards

Chapter 9: Cellular Respiration Harvesting Chemical Energy

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1020477638fermentationA partial degradation of sugars that occurs without the use of oxygen
1020477639aerobic respirationRespiration that requires oxygen
1020477640cellular respirationAnaerobic and aerobic respiration
1020477641redox reactionsOxidation and Reduction reactions
1020477642oxidationA redox reaction in which electrons are lost from one substance to another (charge is increased)
1020477643reductionA redox reaction in which electrons are gained from one substance to another (charge is reduced)
1020477644reducing agentThe electron donor in a redox reaction
1020477645oxidizing agentThe electron donor in a redox reaction
1020477646NAD+(nicotinamide adenine dinucleotide) electron carrier involved in glycolysis
1020477647electron transport chainA sequence of electron carrier molecules (membrane proteins) that shuttle electrons during the redox reactions that release energy used to make ATP.
1020477648GlycolysisCatabolism of glucose or other monosaccharides to pyruvate and 2 molecules of ATP in the absence of oxygen or 34 molecules of ATP in the presence of oxygen.
1020477649citric acid cycleA chemical cycle involving eight steps that completes the metabolic breakdown of glucose molecules to carbon dioxide; occurs within the mitochondrion; the second major stage in cellular respiration.
1020477650oxidative phosphorylationPart of the electron transport chain. A process occurring in the mitochondria that results in the formation of ATP from the flow of electrons across the inner membrane to bind with oxygen.
1020477651substrate-level phosphorylationA mode of ATP synthesis when an enzyme transfers a phosphate group from a substrate molecule to ADP
1020477652acetyl CoAAcetyl Coenzyme A, a compound that is synthesized by cells and that plays a major role in metabolism
1020477653ATP SynthaseThe enzyme that makes ATP from ADP and inorganic phosphate
1020477654chemiosmosisan energy-coupling mechanism that uses energy stored in the form of an H+ gradient across a membrane to drive cellular work
1020477655proton-motive forceThe H+ gradient that results from the electron transport chain
1020477656alcohol fermentationpyruvate is converted to alcohol and converted to acetaldehyde, then acetaldehyde is reduce by NADH to ethanol, this regenerates the supply of NAD+
1020477657lactic acid fermentationpyruvate is reduced directly to NADH to form lactate with no CO2 release
1020477658obligate anaerobesOrganisms that carry out only fermentation or anaerobic respiration
1020477659facultative anaerobesAn organism that makes ATP by aerobic respiration if oxygen is present but that switches to fermentation under anaerobic conditions.
1020477660beta oxidationA metabolic sequence that breaks down fatty acids down to two-carbon fragments, that enter the citric acid cycle as acetyl CoA
1020477661cytochromesElectron carriers between the ubiquinone and oxygen

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