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4.4 Overview of Cellular Respiration
KEY CONCEPT Cellular respiration converts organic molecules like carbohydrates into ATP using oxygen.
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4.4 Overview of Cellular Respiration
Cellular respiration makes ATP by breaking down sugars.
• Cellular respiration is aerobic--requires oxygen.• Aerobic stages take place in mitochondria.
mitochondrion
animal cell
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4.4 Overview of Cellular Respiration
• Glycolysis must take place first.
– anaerobic process (does not require oxygen)– takes place in cytoplasm– splits glucose into two three-carbon molecules– produces two ATP molecules
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4.4 Overview of Cellular Respiration
What does a cell get from Cellular Respiration?
• From Glycolysis (no Oxygen) - 2 ATP’s
This is anaerobic!!
• From the Kreb’s Cycle (Oxygen) -- 36 ATP’s
This is aerobic!!
*CELLULAR RESPIRATION– 38 ATP’s TOTAL
Aerobic Respiration is a better deal as you will see in a few minutes.
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4.4 Overview of Cellular Respiration
• The equation for the overall process is:
C6H12O6 + 6O2 6CO2 + 6H2O
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4.4 Overview of Cellular Respiration
• Did the formula for cellular respiration remind you of anything?
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4.4 Overview of Cellular Respiration
• The equation for the cellular respiration is:
C6H12O6 + 6O2 6CO2 + 6H2O
The equation for photosynthesis is:
6CO2 + 6H2O C6H12O6 + 6O2
• The reactants in photosynthesis are the same as the products of cellular respiration.