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Cellular Respiration Notes

Cellular Respiration Notes. Basic Facts Stage 1: Glycolysis Stage 2: Krebs Cycle Stage 3: Electron Transport Chain and ATP synthase. Basic Facts About Cellular Respiration . All Eukaryotes (Plants and Animals and Fungi) and many Bacteria do Cellular respiration

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Cellular Respiration Notes

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  1. Cellular Respiration Notes Basic Facts Stage 1: Glycolysis Stage 2: Krebs Cycle Stage 3: Electron Transport Chain and ATP synthase

  2. Basic Facts About Cellular Respiration • All Eukaryotes (Plants and Animals and Fungi) and many Bacteria do Cellular respiration • Sugar is broken down into carbon dioxide and the energy stored in sugar is used to make ATP. • Why? Sugar is a good long term energy storing molecule- like having money in the bank, ATP is a good molecule for spending chemical energy in small amounts. • C6H12O6 + 6O2  6CO2 + 6H2O + ATP (chemical energy) • Occurs in 3 stages: • Glycolysis • Krebs Cycle • Electron Transport Chain and ATP synthase

  3. Stage 1: Glycolysis • Sugar enters the cytoplasm and Enzymes break it down into two 3-C carbon molecules called Pyruvate. • Energy (2 ATP) is invested to break Glucose • ATP and electron carriers (NADH) are also made Cytoplasm of Cell Mitochondria 2ATP invested Glucose 2ADP + P Products of Glycolysis 2 Pyruvate: go to mitochondrial for next stage Enzymes 2 NADH (Electron Carriers!!!) 4ATP

  4. Stage 2: Krebs Cycle • Pyruvate enter the mitochondrial Matrix and is completely broken down into CO2 • The enzymes of the Krebs Cycle use the energy in pyruvate to make ATP and more NADH (electron carriers) • NADH goes to Stage 3 Stage 3: ETC and ATP Synthase Outer Membrane 2 Pyruvate 3-Carbon atoms each Inner Membrane ATP Kreb’s Cycle Matrix of Mitochondria fluid and enzyme filled space inside Mitochondria NADH 6 CO2

  5. Stage 3: Electron transport chain and ATP Synthase • NADH the electron carries delivers electrons to the electron transport Chain proteins located on the inner membrane of the mitochondria • Electron transport chain proteins pass electrons to O2 making H2O • Electron transport chain proteins move H+ ions into the inner membrane space of the mitochondria • H+ ions exit through ATP synthase generating about 34-36 ATP H+ H+ H+ H+ H+ H+ K H+ NADH H+ H+ Inner Membrane Space Kreb’s Cycle Electron Transport Chain Proteins NADH ADP O2 H2O ATP

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