Cellular Respiration

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yourmomhaslice
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197841
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Cellular Respiration
Updated:
2013-02-04 11:57:57
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Cellular respiration bio lecture
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Lecture seven bio exam 1
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  1. Cellular respiration
    • –oxygen
    • in and carbon dioxide waste out

    •Converts food energy into ATP (small convenient energy source)
  2. ATP
    • Stands for Adenosine triphosphate
    • This is an energy source. If energy is needed this is needed.
  3. The 4 steps to cellular respiration
    Glycolysis

    Pyruvate processing

    Krebs cycle

    Electron transport chain and chemiosmosis
  4. GLYCOLYSIS
    • •Takes place in the cytosol
    • Does not require oxygen
    • •Glucose broken down into pyruvate
    • Produces NADH and 2 ATP per glucose
  5. NADH
    • An electron carrier for later steps
    • a high energy molecule used by cells to generate ATP
  6. Anaerobic
    Does not require oxygen
  7. pyruvate
    the end product of glycolysis
  8. GLYCOLYSIS REGULATION
    An example of feedback inhibition in which too much ATP is created so ATP plugs into other site and shuts down glycolysis, stopping atp production.
  9. Pyruvate Processing
    • Occurs in Mitochondrial Matrix.
    • •Pyruvate converted to acetyl-CoA
    • Produces
    • NADH (electron carrier) and CO2 (waste product
  10. –oxygenin and carbon dioxide waste out•Converts food energy into ATP (small convenient energy source)
    Cellular Respiration
  11.  Stands for Adenosine triphosphateThis is an energy source. If energy is needed this is needed.
    ATP
  12. Glycolysis Pyruvate processingKrebs cycleElectron transport chain and chemiosmosis
    The four steps to cellular respiration
  13. •Takes place in the cytosol. Does not require oxygen
    •Glucose broken down into pyruvate
    Produces NADH and 2 ATP per glucose
    Glycolysis
  14. An electron carrier for later stepsa high energy molecule used by cells to generate ATP
    NADH
  15. Does not require oxygen
    Anaerobic
  16. The end product of glycolysis
    Pyruvate
  17. An example of feedback inhibition in which too much atp is created so atp plugs into other site and shuts down glycolysis stopping ATP production
    Glycolysis Regulation
  18. Occurs in Mitochondrial Matrix
    Pyruvate converted to acetyl-coA
    Produces NADH and CO2
    Pyruvate Processing
  19. Krebs Cycle
    • •Occurs in mitochondrial
    • matrix

    •Acetyl-CoA enters cycle

    •Produces NADH, FADH2, ATP, and CO2

    • 2
    • ATP per glucose
  20. •Occurs in mitochondrial
    matrix

    •Acetyl-CoA enters cycle

    •Produces NADH, FADH2, ATP, and CO2

    2
    ATP per glucose
    Krebs Cycle
  21. Electron Transport CHAIN
    • •Occurs in the mitochondrial
    • inner membrane

    •NADH and FADH2 release electrons

    • •Protons (H+) pumped into the intermembrane
    • space

    • –forms
    • gradient

    • •Oxygen accepts electrons and protons to
    • form water

    • –so
    • step is aerobic
  22. •Occurs in the mitochondrial
    inner membrane

    •NADH and FADH2 release electrons

    •Protons (H+) pumped into the intermembrane
    space

    –forms
    gradient

    •Oxygen accepts electrons and protons to
    form water

    –so
    step is aerobic
    Electron Transport Chain
  23. CHEMIOSMOSIS
    • •Protons diffuse across membrane
    • through ATP
    • Synthase (membrane protein complex)

    •Provides energy to produce ATP

    •About 26 ATP per glucose
  24. •Protons diffuse across membrane
    through ATP
    Synthase (membrane protein complex)

    •Provides energy to produce ATP

    •About 26 ATP per glucose
    Chemiosmosis
  25. About how many ATP molecules are produced from one glucose molecule?
    30
  26. What happens if no oxygen is available?
    Fermentation
  27. Fermentation
    • •Occurs under anaerobic
    • conditions

    •Regenerates NAD+ to repeat glycolysis

    • •Inefficient – only 2 ATP per
    • glucose

    •Produces by-products
  28. •Occurs under anaerobic
    conditions

    •Regenerates NAD+ to repeat glycolysis

    •Inefficient – only 2 ATP per
    glucose

    •Produces by-products
    Fermentation
  29. ALCOHOL FERMENTATION
    •Occurs in yeast

    • •Produces NAD+ and
    • ethanol
  30. •Occurs in yeast

    •Produces NAD+ and
    ethanol
    Alcohol Fermentation
  31. LACTIC
    ACID FERMENTATION
    •Occurs in humans

    • •Produces NAD+
    • and lactate
  32. •Occurs in humans

    •Produces NAD+
    and lactate
    Lactic acid fermentation
  33. Are there alternatives to glucose?
    • Yes
    • •Proteins, fats, and other
    • carbohydrates can all be used for cellular respiration
  34. Important source of energy (sugar)
    Glucose

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