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AP Biology - Chapter 9 Cellular Respiration Flashcards

Cellular Respiration and Fermentation

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7725867042fermentationanaerobic process that produces little ATP, includes glycolysis, and restores NAD+0
7725867043aerobic respirationcatabolic pathway which requires oxygen and occurs in cytoplasm and mitochondria1
7725867044anaerobic respirationcatabolic pathway which does not require oxygen and occurs only in cytoplasm2
7725867045oxidationloss of electrons from atoms of a substance3
7725867046reductionaddition of electrons to atoms of a substance4
7725867047reducing agentelectron donor in a redox reaction5
7725867048oxidizing agentelectron acceptor in a redox reaction6
7725867049NAD+electron carrier used in cellular respiration to transfer electrons from Kreb's cycle to ETC7
7725867050electron transport chain (ETC)(1) transfer of electrons from glucose via NADH/FADH2 to transmembrane proteins and subsequently using their high energy to pump protons to intermembrane space in mitochondria or thylakoid space in chloroplasts8
7725867051citric acid (Kreb's) cycle(B) 2nd step of cellular respiration that breaks down AcetylCoA to 2 carbon dioxide, 1 ATP, 3NADH, and 1 FADH2 molecules in mitochondrial matrix (aerobic)9
7725867052glycolysis(A) 1st step of cellular respiration that splits glucose into 2 molecules of pyruvic acid and 2 ATPs (anaerobic, catabolic/exergonic)10
7725867053Pi (not π)inorganic phosphate11
7725867054oxidative phosphorylation(3) synthesis of ATP from ADP and Pi at ATP synthase using energy from glucose electrons which are ultimately transferred to oxygen (final electron acceptor) using ETC in mitochondrial cristae (aerobic)12
7725867055substrate level phosphorylationsynthesis of ATP by transferring a phosphate group directly to ADP using an enzyme13
7725867056chemiosmosis(3) movement of protons down their concentration gradient coupled to ATP synthesis14
7725867057proton motive forcepotential energy stored in form of an electrochemical gradient generated by pumping hydrogen ions across membranes during ETC15
7725867058alcohol fermentationconversion of pyruvate to carbon dioxide and 2-carbon compound in absence of oxygen to regenerate NAD+ needed for glycolysis (in yeast)16
7725867059lactic acid fermentationconversion of pyruvate to 3-carbon compound in absence of oxygen to regenerate NAD+ needed for glycolysis (in our muscles)17
7725867060obligate anaerobesorganisms that can only survive WITHOUT oxygen18
7725867061beta oxidationmetabolic pathway that breaks down fatty acids into two-carbon fragments which enter Krebs cycle as acetyl CoA19
7725867062redoxelectron transfer reactions that occur together and in which one chemical is oxidized and the other reduced20
7725867063formation of acetyl CoAmetabolic link between glycolysis and aerobic respiration21
7725867064cellular respirationexergonic process that includes 3 steps and releases energy (ATP) by breaking down glucose and other molecules in presence of oxygen22
7725867065cytochromesiron-containing proteins that play key role in electron transport chains in mitochondria, chloroplasts, and cell membranes of prokaryotes23
7725867066ATP synthaseenzyme in mitochondrial cristae and chloroplast thylakoids that uses energy of proton gradient to add a phosphate group to ADP and so form ATP24
7725867067facultative anaerobesorganisms that can survive with OR without oxygen25
7725867068dehydrogenasesenzymes that transfer hydrogen atoms26
7725867069isomerases/mutasesenzymes that move atoms within a molecule27
7725867070kinases/phosphatasesenzymes that transfer phosphate groups28
7725867071adolasesenzymes that cut molecules29
7725867072enolasesenzymes that add double bonds to molecules30

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