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Krebs cycle aerobic and anaerobic cycles

Krebs cycle aerobic and anaerobic cycles . Summary: 3 steps:. 1 st glycolysis 2 nd Krebs cycle 3 rd Electron Transport Chain (ETC) . Respiration occurs in ALL cells and can take place either with or without oxygen present. = ANAEROBIC. PYRUVIC ACID MOVES TO NEXT STEP

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Krebs cycle aerobic and anaerobic cycles

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  1. Krebs cycle aerobic and anaerobic cycles

  2. Summary: 3 steps: • 1stglycolysis • 2nd Krebs cycle • 3rd Electron Transport Chain (ETC)

  3. Respiration occurs in ALL cells and can take place either with or without oxygen present.

  4. = ANAEROBIC PYRUVIC ACID MOVES TO NEXT STEP IF THERE IS NO OXYGEN (______________) IF THERE IS OXYGEN (_____________) = AEROBIC

  5. Aerobic Respiration:requires oxygen • Occurs in the mitochondria of the cell • Total of 36 ATP molecules produced • General formula for aerobic respiration: C6H12O6 + 6O2 6CO2 + 6H2O + 36 ATP glucose + oxygen carbon dioxide + water + energy Human cells contain a specialized structure – the mitochondrion – that generates energy.

  6. Diagram Electrons carried in NADH Mitochondria In Cytoplasm Electrons carried in NADH and FADH2 Krebs Cycle Electron Transport Chain Glucose Glycolysis 2 2 32

  7. Summary: 3 steps: • 1stglycolysis • 2nd Krebs cycle • 3rd Electron Transport Chain (ETC)

  8. Anaerobic Respiration:occurs when no oxygen is available to the cell (2 kinds: Alcoholic and Lactic Acid) • Also called fermentation • Much less ATP produced than in aerobic respiration

  9. Alcoholic fermentation—occurs in bacteria and yeast Process used in the baking and brewing industry—yeast produces CO2gas during fermentation to make dough rise and give bread its holes glucose ethyl alcohol + carbon dioxide + 2 ATP

  10. Lactic acid fermentation—occurs in muscle cells Lactic acid is produced in the muscles during rapid exercise when the body cannot supply enough oxygen to the tissues—causes burning sensation in muscles glucose lactic acid + carbon dioxide + 2 ATP

  11. Krebs Cycle ETC Mitochondria • First step in anaerobic respiration is also glycolysis Diagram Anaerobic Respiration Cytoplasm Alcoholic fermentation Bacteria, Yeast 2 ATP • C6H12O6 • glucose glycolysis Lactic acid fermentation Muscle cells 2 ATP Aerobic Respiration 36 ATP

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