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Aerobic respiration: the Krebs cycle

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Title: Aerobic respiration: the Krebs cycle and election transport Author: levyj Last modified by: levyj Created Date: 11/1/2011 11:54:25 PM Document presentation format – PowerPoint PPT presentation

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Title: Aerobic respiration: the Krebs cycle


1
Aerobic respiration the Krebs cycle electron
transport system
  • What happens in the mitochondria
  • does not stay in the mitochondria

2
Aerobic Respiration
  • Occurs in the mitochondria.
  • Composed of two processes
  • Citric acid cycle (Krebs).
  • Electron Transport System (ETS)

Mitochonodria located in a muscle cell
3
Krebs cycle aka Citric acid cycle
  • Occurs in the matrix.
  • Uses pyruvic acid as a raw material
  • uses oxygen
  • Produces 2 ATP, NADH FADH2
  • Waste product is carbon dioxide.

4
Electron Transport System
  • Occurs in the cristae
  • Produces 34 ATP
  • Uses NADH FADH2 in order to store hydrogen.
  • Uses oxygen
  • Waste product is water.

5
ATP Production Summary
  • Glycolysis.
  • 4 ATP produced - 2 ATP used 2ATP Gained
  • Citric Acid Cycle (Krebs)
  • 2 ATP Produced.
  • Electron Transport System
  • 34 ATP Produced
  • Total ATP Produced from each glucose molecule
    38 ATP

6
Efficiency Comparison
Anaerobic respiration ------ 2 Aerobic
respiration --------- 66 More energy
from the same food! More bang for
your Buck!
Whole foods anaerobic
the dollar store aerobic
7
Reactants and Products
  • Process
  • Glycolysis
  • Citric Acid Cycle
  • ETS

Reactants Glucose Pyruvic acid (Acetyl
CoA) NADH FADH2
Products Pyruvic acid NADH NADH
FADH2 Carbon dioxide Water
Start with glucose in glycolysis, add O2 during
Krebs cycle CO2 is produced, during ETS water
is produced.
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