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Slide 1

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Krebs cycle…read more

Slide 2

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Link reaction
Pyruvate crosses the mitochondrial membrane
from the cytoplasm.
It is converted into a 2C compound known as
acetyl coenzyme A (acetyl coA).
CO2 is released
Reduced NAD is formed…read more

Slide 3

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Occurs in the
Krebs cycle: How it occurs
The 2C compound combines with a 4C compound to
form the 6C compound citric acid.
The citric acid is broken down in a number of stages to
give a 4C compound.
Two molecules of CO2 are released.
The 4C compound combines with more 2C acetyl coA
and the cycle turns again.…read more

Slide 4

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For every molecule of glucose
which enters the glycolytic
pathway, the Krebs cycle turns
TWICE. (6C glucose giving two
3C pyruvate)
Net production
For every molecule of pyruvate that enters the
Krebs cycle:
3 molecules of reduced NAD
1 molecules of reduced FAD and
1 molecule of ATP are formed.
The reduced NAD and reduced FAD then
enter the electron transport chain.…read more

Slide 5

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Pyruvate (3C)
Mitochondrial matrix CO2 Reduced NAD
Acetyl coenzyme A (2C) All the reduced hydrogen acceptors
channel hydrogen through the
respiratory chain to produce ATP.
Citrate (6C)
4C acid CO2
Reduced NAD
5C acid
Reduced NAD
Reduced FAD
Reduced NAD NAD AT
P…read more


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