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Published bySibyl Henderson Modified over 9 years ago
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Cellular Respiration
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Definition: Decomposition pathway that provides the energy cells need to function Each step is enzyme catalyzed
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Cellular Respiration Can occur aerobically or anaerobically Aerobic=requires Oxygen Anaerobic=absence of Oxygen What do we make we anaerobic respiration?
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Aerobic Respiration
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Stages of cell respiration Glycolysis Krebs Cycle Electron Transport Chain
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Glycolysis Breaks Glucose into pyruvate Happens in the cytoplasm Reactants Glucose (6 carbon) 2 ATP Products 2 pyruvate molecules (3 carbon compound) 4 ATP (Net=2ATP) 2 NADH
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Glycolysis
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What is NADH anyway? Just a molecule NAD gets reduced and gains an electron (H) becoming NADH Don’t worry too much about it A molecule that has the potential to make ATP
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Kreb’s cycle Occurs in Mitochondria matrix Breaks down the pyruvate from glycolysis into CO2 Reactants: Pyruvate End result for one glucose molecule is 2 ATP 8 NADH 2 FADH 2 6 CO 2
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Electron Transport Chain Occurs in Inner Membrane of mitochondria Uses NADH and FADH 2 from Glycolysis and Krebs to create ATP Reactants: NADH and FADH 2 and O 2 Each NADH=3 ATP Each FADH2=2 ATP Products: 34 ATP and H 2 O
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Purpose of cell respiration To break bonds in Food (stored energy) and create ATP (usable energy for cell)!
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