Chapter 9: Cellular Respiration
 C6H12O6 + O2  6CO2 + 6H2O + 36 ATP
 Cellular Respiration – mitochondria break down glucose to produce ATP
 3 Stages of Cellular Respiration
1. Glycolysis
 Occurs in cytoplasm
 No oxygen required
 Break down glucose into 2 molecules of pyruvic acid
 2 molecules of ATP are used to start reaction
 4 ATP molecules are produced
 Your body gets to store 2 ATP and 2 ATP go back to restart the reaction
 NAD+ - an energy carrying molecule
 NADH when it is carrying an electron
 Glucose + 2 ATP → 2 pyruvic acid
4 ATP (body stores 2 and 2 restart the reaction)
2 NADH
 After glycolysis the pyruvic acid molecules move to the mitochondria
2. Citric Acid Cycle
 Also called Kreb Cycle
 Occurs in the mitochondria
 Aerobic – requires oxygen
 2 pyruvic acid → 2 citric acid
2 ATP
4 CO2
2 FADH2
6 NADH
3. Electron Transport Chain
 Occurs in the inner membrane of the mitochondria
 Aerobic
 NADH and FADH2 energized electrons are passed from protein to protein
releasing energy when H+ break off
 The energy associated with highly energized electron forms ATP from ADP
 Energy being released from electron allows O2 to bond with H+ to make H2O
 Produces 32 ATP molecules
32 ADP → 32 ATP
O2 → H2O
 When your cells are without oxygen an anaerobic process called fermentation
proceeds
 Provides a way to continue producing ATP until oxygen is available again
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 2 Types of Fermentation
1. Lactic Acid
 Anaerobic
 Occurs in cytoplasm
 Occurs in animals
 2 Pryuvic acid is broken down into 2 lactic acid
 Lactic acid build up in muscles and causes burn or fatigue
 2 pyruvic acid → 2 lactic acid
2. Alcoholic Fermentation
 Anaerobic
 Occurs in cytoplasm
 Occurs in yeast, bacteria, plants
 Produce CO2 and ethyl alcohol
 2 pyruvic acid → 2 ethyl alcohol
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Chapter 9: Cellular Respiration

 Cellular Respiration –
 3 Stages of Cellular Respiration
1. Glycolysis
 Occurs in _______________ of cell

 Break down glucose into 2 molecules of ____________ ________
 _____ molecules of ATP are used to start reaction
 _____ ATP molecules are produced
 Your body gets to store _____ ATP and _____ ATP go back to restart the
reaction
 Glucose + 2 ATP →
 After glycolysis the pyruvic acid molecules move to the _________________
2. Citric Acid Cycle
 Also called __________ __________
 Occurs in the _______________
 Aerobic –
 2 pyruvic acid →
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3. Electron Transport Chain
 Occurs in the __________ membrane of the mitochondria

 _______ and _______ energized electrons are passed from protein to protein
 The energy associated with highly energized ____________ forms ______
from ______
 Energy being released from electron allows ______ to bond with ______ to
make ________
 Produces ______ ATP molecules
 32 ADP →
O2 →
 When your cells are without oxygen an anaerobic process called
__________________ proceeds
 Provides a way to continue producing ATP until oxygen is available again
 2 Types of Fermentation
1. Lactic Acid

 Occurs in _______________
 Occurs in _______________
 2 Pryuvic acid is broken down into 2 _________ __________
 Lactic acid build up in muscles and causes ________ or ___________
 2 pyruvic acid →
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2. Alcoholic Fermentation

 Occurs in _______________
 Occurs in __________, ___________, __________
 Produce ______ and __________ __________

2 pyruvic acid →
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