Download Cellular Respiration

Chemiosmosis
CO2
2
H2O
2
32
Cytoplasm
(Cytosol)
Glycolysis
•
•
•
•
•
Where? = In the Cytoplasm
# ATP Produced = Net Gain of 2
Electron Carriers = Produces NADH
Oxygen = NOT required (anaerobic)
What Happens? = 1 molecule of Glucose is
split into 2 molecules of Pyruvic Acid
(pyruvate)
Net Gain of
Aerobic
In Mitochondria
OR Anaerobic Fermentation in the Cytosol
Fermentation
•
•
•
•
•
Where? = In the Cytoplasm
# ATP Produced = NONE
Electron Carriers = Produces NAD+
Oxygen = NOT required (anaerobic)
What Happens? = If oxygen is NOT available,
Pyruvic Acid is broken down into either
Ethanol & CO2 (yeast) or Lactic Acid (animals)
INSTEAD of going through the Kreb’s Cycle
Alcoholic Fermentation
Kreb’s Cycle
• Where? = In the Mitochondria (matrix)
• What Happens? = If oxygen IS available,
fermentation does NOT happen.
• # ATP Produced = 2
• Electron Carriers = Produces 8 NADH and
2 FADH2
• Oxygen = REQUIRED (aerobic)
Kreb’s Cycle
What Happens? = If oxygen IS available,
fermentation does NOT happen.
1. Pyruvic Acid is converted into Acetyl CoA.
2. This joins with oxaloacetic acid to form citric
acid.
3. Citric Acid goes through a cycle where CO2
and electron carriers are formed.
4. The 2 original pyruvic acid molecules are
completely broken down into CO2
Kreb’s
(Citric Acid)
Cycle
Electron Transport Chain
• # ATP Produced = 32
• Electron Carriers = Uses NADH and FADH2
to produce a H+ ion gradient
• Oxygen = REQUIRED (aerobic)
• Where? = In the Mitochondria (across
INNER membrane)
Electron Transport Chain
• What Happens? =
1. The electron carriers (NADH & FADH2) are
used to pump H+ ions across the inner
membrane (from the Matrix to the
Intermembrane Space).
2. This creates a concentration gradient that
allows ATPsynthase to convert ADP into ATP
(chemiosmosis).
3. 6 H2O is produced as a byproduct of ETC.
Electron Transport Chain
INTERMEMBRANE SPACE
HIGH
INNER MEMBRANE
LOW
MATRIX
6 O2 + C6H12O6  6CO2 + 6 H2O + 36 ATP
Krebs
2. Krebs Cycle
Oxygen (6 O2) & Glucose (C6H12O6 )
Water (6 H2O) & Carbon Dioxide (6CO2 ) & 36 ATP
3. ETC
Cellular Respiration Videos
• ETC Animation
http://www.science.smith.edu/departments/
Biology/Bio231/etc.html
• Mr. Anderson
http://www.youtube.com/watch?v=Gh2P5Cm
CC0M
• http://www.sciencegeek.net/Biology/review/
U2RespFillin.htm
Comparison of
Photosynthesis
and Cellular
Respiration
Chemiosmosis
CO2
2
H2O
2
32
Photosynthesis
Purpose
Sequence of
Steps
Location
Reactants
Products
Equation
Cellular
Respiration
Purpose
Photosynthesis
Cellular
Respiration
Break Down
Convert Sunlight
Carbohydrates
into Chemical
into Chemical
Energy in order to
Energy (ATP) to be
Build
used to Power
Carbohydrates for
Life Processes
use as Food
Sequence of
Steps
Photosynthesis
Light Dependent
Reaction
Light Absorption & ETC
(Photosystems 2 then 1)
& Chemiosmosis
 Calvin Cycle
Cellular
Respiration
Glycolysis 
Krebs Cycle 
Electron
Transport Chain
(& Chemiosmosis)
Location
Photosynthesis
Chloroplast:
1. Light
Dependent =
Thylakoid
2. Calvin Cycle =
Stroma
Cellular
Respiration
Mitochondria:
1. Glycolysis =
Cytoplasm
(outside mitochondria)
2. Krebs Cycle =
Matrix
3. ETC = Inner
Membrane
Reactants
Photosynthesis
Light, Water &
Carbon Dioxide
1. Light
Dependent =
Water (6 H2O)
2. Calvin Cycle =
Carbon Dioxide
(6 CO2)
Cellular
Respiration
Glucose & Oxygen
1. Glycolysis =
Glucose
2. Krebs Cycle =
Oxygen &
Pyruvate (acetyl CoA)
3. ETC = Oxygen,
NADH, FADH2, &
ADP
Products
Photosynthesis
Cellular
Respiration
Carbon Dioxide,
Water, & ATP
Glucose & Oxygen
1. Glycolysis =
1. Light
Dependent =
Oxygen (6 O2), ATP,
& NADPH
2. Calvin Cycle =
Glucose (C6H12O6)
2 Pyruvate, 2 ATP,
2 NADH
2. Krebs Cycle =
2 ATP, 8 NADH,
2 FADH2, 6 CO2
3. ETC = 6 H2O, 32 ATP
Equation
Photosynthesis
6CO2 + 6H2O + Light  C6H12O6 + 6O2
Cellular Respiration
C6H12O6 + 6O2  6CO2 + 6H2O + 36 ATP
Review Videos
• Mr. Anderson Photos. & CR
http://www.youtube.com/watch?v=0IJMRsTc
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