Transcript Respiration Ppt

Cellular
Respiration
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What Is ATP?
Energy used by all Cells
Adenosine Triphosphate
Organic molecule containing highenergy Phosphate bonds
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Chemical Structure of ATP
Adenine Base
3 Phosphates
Ribose Sugar
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What Does ATP Do for
You?
It supplies YOU with ENERGY!
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How Do We Get Energy From
ATP?
By breaking
the highenergy bonds
between the
last two
phosphates
in ATP
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What is the Process Called?
HYDROLYSIS (Adding H2O)
H 2O
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How Does That Happen?
An Enzyme!
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How is ATP Re-Made?
The reverse of the previous
process occurs.
Another Enzyme is
used!
ATP Synthetase
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The ADP-ATP Cycle
ATP
Synthetase
ATP-ase
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When is ATP Made in the
Body?
During a
Process called
Cellular
Respiration
that takes
place in both
Plants &
Animals by
breaking down
glucose.
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Overall Equation for
Cellular Respiration
C6H12O6
+ 6O2
YIELDS
6CO2 + 6H20 + 38ATP’s
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What are the Stages of
Cellular Respiration?
 Glycolysis
 The
Krebs Cycle
 The Electron Transport Chain
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Where Does Cellular
Respiration Take Place?
 It
actually
takes place in
two parts of
the cell:
Glycolysis occurs
in the Cytoplasm
Krebs Cycle &
ETC Take place in
the MitochondriaCopyright Cmassengale
Review of Mitochondria
Structure
Smooth outer
Membrane
 Folded inner
membrane
 Folds called
Cristae
 Space inside
cristae called the
Matrix

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Glycolysis Summary
• Takes place in the Cytoplasm
• Anaerobic (Doesn’t Use Oxygen)
• Requires input of 2 ATP
• Glucose split into two
molecules of Pyruvate or
Pyruvic Acid
• Also produces 2 NADH and
4ATP, CO2 is released(waste)
Glycolysis
Diagram
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Fermentation
 Occurs when O2 NOT present
(anaerobic)
Called Lactic Acid fermentation in
muscle cells (makes muscles tired)
Called Alcoholic fermentation in
yeast (produces ethanol)
Nets only 2 ATP
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Krebs Cycle Summary
Also known as the Citric Acid Cycle
 Requires Oxygen (Aerobic)
 Cyclical series of reactions that
give off CO2 and produce one ATP
per cycle
 Turns twice per glucose molecule
 Produces 2 ATP
 Takes place in matrix of
mitochondria Copyright Cmassengale

Krebs Cycle Summary
 Each
turn of the Krebs Cycle
also produces NADH, FADH2,
and CO2
 The NADH and FADH2 carry
electrons to the Electron
Transport Chain
 The CO2 produced is released
as waste.
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Krebs Cycle
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Electron Transport Chain
Summary
Occurs Across Inner Mitochondrial
membrane (cristae)
 Requires Oxygen
 Uses FADH2 and NADH from Krebs
Cycle and NADH from Glycolysis
 H2O Produced and is released
 FAD+ and NAD+ are produced and
recycled to be used again in
Glycolysis and the Krebs Cycle
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 34 ATP Produced

Electron Transport Chain
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Cellular Respiration
Summary
The complete breakdown of glucose
through cellular respiration
(including glycolysis) results in the
production of 38 ATP molecules.
 Glycolysis = 2 ATP
 Krebs Cycle = 2 ATP
 Electron Transport Chain = 34 ATP

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Cellular Respiration
Summary
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