Cellular Respiration Harvesting Chemical Energy

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Cellular RespirationHarvesting Chemical Energy
ATP
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Cellular Respiration Stage 1 Glycolysis
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Cellular respiration is a process which generates
energy in living things. It extracts stored
energy from glucose to form ATP. The energy
stored in ATP can then be used to drive processes
requiring energy, including bio-synthesis,
locomotion or transportation of molecules across
cell membranes.. There are two types of
cellular respiration
ANAEROBIC/Fermentation (without Oxygen)
Glycolysis Lactic Acid Fermentation
or Alcoholic Fermentation
AEROBIC (requires Oxygen) Glycolysis Krebs
Cycle Electron Transport Chain
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Glycolysis

• Breaking down glucose
  glyco lysis (splitting
  sugar)
• This is the beginning stage for both
  aerobic/anaerobic
• Its inefficient
• generate only 2 ATP for every 1 glucose
• occurs in the cytoplasm of the cell
• right outside the mitochondria

Thats not enoughATP for me!
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Begins With..
Ends With..
,
,
2 NADH
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Energy Input Steps
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Energy Releasing Steps
Now Unstable
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Energy Releasing Steps, cont.
Now Unstable
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Key Points

• Convert glucose (6C) to 2 pyruvate (3C)
• produces 4 ATP 2 NADH
• consumes2 ATP
• net yield 2 ATP 2 NADH

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Pyruvate is a branching point

• Pyruvate

fermentation anaerobicrespiration
mitochondria Krebs cycle aerobic respiration
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Glycolysis summary
endergonic invest some ATP
ENERGY INVESTMENT
-2 ATP
G3P C-C-C-P
exergonic harvest a little ATP a little NADH
ENERGY PAYOFF
4 ATP
like in the bank

• net yield
• 2 ATP
• 2 NADH

NET YIELD