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Made by kush sehgal xi science r.no -29

The kreb's cycle' - class 11 cbse

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the kreb's cycle ~kush sehgal

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Page 1: The kreb's cycle' - class 11 cbse

Made by kush sehgalxi science r.no -29

Page 2: The kreb's cycle' - class 11 cbse

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

Page 3: The kreb's cycle' - class 11 cbse

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

Page 4: The kreb's cycle' - class 11 cbse
Page 5: The kreb's cycle' - class 11 cbse

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

Page 6: The kreb's cycle' - class 11 cbse

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

Page 7: The kreb's cycle' - class 11 cbse

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