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Krebs Cycle PowerPoint Presentation

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Krebs Cycle Presentation Transcript

Slide 1 - The Krebs Cycle Occurs in the matrix of the mitochondrion Aerobic phase (requires oxygen) 2-carbon acetyl CoA joins with a 4-carbon compound to form a 6- carbon compound called Citric acid
Slide 2 - Citric acid (6C) is gradually converted back to the 4-carbon compound -ready to start the cycle once more The carbons removed are released as CO2 -enzymes controlling this process called decarboxylases The hydrogens, which are removed, join with NAD to form NADH2 -enzymes controlling the release of hydrogen are called dehydrogenases
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Slide 4 - The Cytochrome System 6 points along pathway where hydrogen is released and temporarily bound to NAD Reduced coenzyme NADH2 transfers hydrogen to a chain of hydrogen carriers called cytochrome system These systems are attached to the cristate of every mitochondrion
Slide 5 - Transfer of hydrogen from each NADH2 along system -produces 3 ATP -process called oxidative phosphorylation Complete oxidation of glucose yields 38 ATP -2 during glycolysis -36 during oxidative phosphorylation
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Slide 7 - The role of oxygen Final hydrogen acceptor Combines to form water Controlled by enzyme cytochrome oxidase Presence of oxygen also essential for hydrogen to pass along the cytochrome system
Slide 8 - This powerpoint was kindly donated to www.worldofteaching.com http://www.worldofteaching.com is home to over a thousand powerpoints submitted by teachers. This is a completely free site and requires no registration. Please visit and I hope it will help in your teaching.