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AP Biology - Chapter 9 Flashcards

Cellular Respiration and Fermentation

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5839299155fermentationanaerobic process that produces little ATP, includes glycolysis, and restores NAD+0
5839299156aerobic respirationcatabolic pathway which requires oxygen and occurs in cytoplasm and mitochondria1
5839299157anaerobic respirationcatabolic pathway which does not require oxygen and occurs only in cytoplasm2
5839299158oxidationloss of electrons from atoms of a substance3
5839299159reductionaddition of electrons to atoms of a substance4
5839299160reducing agentelectron donor in a redox reaction5
5839299161oxidizing agentelectron acceptor in a redox reaction6
5839299162NAD+electron carrier used in cellular respiration to transfer electrons from Kreb's cycle to ETC7
5839299163electron 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
5839299164citric 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
5839299165glycolysis(A) 1st step of cellular respiration that splits glucose into 2 molecules of pyruvic acid and 2 ATPs (anaerobic, catabolic/exergonic)10
5839299166Pi (not π)inorganic phosphate11
5839299167oxidative 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
5839299168substrate level phosphorylationsynthesis of ATP by transferring a phosphate group directly to ADP using an enzyme13
5839299169chemiosmosis(3) movement of protons down their concentration gradient coupled to ATP synthesis14
5839299170proton motive forcepotential energy stored in form of an electrochemical gradient generated by pumping hydrogen ions across membranes during ETC15
5839299171alcohol fermentationconversion of pyruvate to carbon dioxide and 2-carbon compound in absence of oxygen to regenerate NAD+ needed for glycolysis (in yeast)16
5839299172lactic acid fermentationconversion of pyruvate to 3-carbon compound in absence of oxygen to regenerate NAD+ needed for glycolysis (in our muscles)17
5839299173obligate anaerobesorganisms that can only survive WITHOUT oxygen18
5839299174beta oxidationmetabolic pathway that breaks down fatty acids into two-carbon fragments which enter Krebs cycle as acetyl CoA19
5839299175redoxelectron transfer reactions that occur together and in which one chemical is oxidized and the other reduced20
5839299176formation of acetyl CoAmetabolic link between glycolysis and aerobic respiration21
5839299177cellular respirationexergonic process that includes 3 steps and releases energy (ATP) by breaking down glucose and other molecules in presence of oxygen22
5839299178cytochromesiron-containing proteins that play key role in electron transport chains in mitochondria, chloroplasts, and cell membranes of prokaryotes23
5839299179ATP synthaseenzyme in mitochondrial cristae and chloroplast thylakoids that uses energy of proton gradient to add a phosphate group to ADP and so form ATP24
5839299180facultative anaerobesorganisms that can survive with OR without oxygen25
5839299181dehydrogenasesenzymes that transfer hydrogen atoms26
5839299182isomerases/mutasesenzymes that move atoms within a molecule27
5839299183kinases/phosphatasesenzymes that transfer phosphate groups28
5839299184adolasesenzymes that cut molecules29
5839299185enolasesenzymes that add double bonds to molecules30

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