chemiosmosis
DESCRIPTION
Chemiosmosis. CO 2. H 2 O. 32. 2. 2. Glycolysis. # ATP Produced = Net Gain of 2 Electron Carriers = Produces NADH Oxygen = NOT required (anaerobic) Where? = In the Cytoplasm What Happens? = 1 molecule of Glucose is split into 2 molecules of Pyruvic Acid (pyruvate). Net Gain of. - PowerPoint PPT PresentationTRANSCRIPT
2 2 32
Chemiosmosis
CO2 H2O
Glycolysis
• # ATP Produced = Net Gain of 2• Electron Carriers = Produces NADH• Oxygen = NOT required (anaerobic)• Where? = In the Cytoplasm• 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
• # ATP Produced = NONE• Electron Carriers = Produces NAD+• Oxygen = NOT required (anaerobic)• Where? = In the Cytoplasm• 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
Kreb’s Cycle
• # ATP Produced = 2• Electron Carriers = Produces 8 NADH and
2 FADH2
• Oxygen = REQUIRED (aerobic)• Where? = In the Mitochondria (matrix)
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 original pyruvic acid molecules are
completely broken down into CO2.
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
MATRIX
INNER MEMBRANE
INTERMEMBRANE SPACE
HIGH
LOW
Cellular Respiration Videos
• ETC Animation http://www.science.smith.edu/departments/Biology/Bio231/etc.html
• Mr. Anderson http://www.youtube.com/watch?v=Gh2P5CmCC0M
• http://www.sciencegeek.net/Biology/review/U2RespFillin.htm
Comparison of Photosynthesis
and Cellular Respiration
2 2 32
Chemiosmosis
CO2 H2O
Photosynthesis Cellular Respiration
Purpose
Sequence of StepsLocation
Reactants
Products
Equation
PurposePhotosynthesis
Convert Sunlight into Chemical
Energy in order to Build
Carbohydrates for use as Food
Cellular Respiration
Break Down Carbohydrates into Chemical
Energy (ATP) to be used to Power Life Processes
Sequence of Steps
PhotosynthesisLight Dependent Reaction (Light Absorption in Photosystems 2 then 1 & Chemiosmosis)
Calvin Cycle
Cellular RespirationGlycolysis Krebs Cycle Electron Transport Chain (& Chemiosmosis)
LocationPhotosynthesisChloroplast: 1. Light
Dependent = Thylakoid
2. Calvin Cycle = Stroma
Cellular RespirationMitochondria:1. Glycolysis =
Cytoplasm (outside mitochondria)
2. Krebs Cycle = Matrix
3. ETC = Inner Membrane
ReactantsPhotosynthesisLight, Water & Carbon Dioxide1. Light Dependent
= Water (6 H2O)
2. Calvin Cycle = Carbon Dioxide (6 CO2)
Cellular RespirationGlucose & Oxygen1. Glycolysis =
Glucose2. Krebs Cycle =
Oxygen & Pyruvate (acetyl CoA)
3. ETC = Oxygen, NADH, FADH2, & ADP
ReactantsPhotosynthesisGlucose & Oxygen1. Light
Dependent = Oxygen (6 O2), ATP, & NADPH
2. Calvin Cycle = Glucose (C6H12O6)
Cellular RespirationCarbon Dioxide, Water, & ATP1. Glycolysis = 2
Pyruvate, 2 ATP, 2 NADH
2. Krebs Cycle = 2 ATP, 8 NADH, 2 FADH2, 6 CO2
3. ETC = 6 H2O, 32 ATP
EquationPhotosynthesis
6CO2 + 6H2O + Light C6H12O6 + 6O2
Cellular RespirationC6H12O6 + 6O2 6CO2 + 6H2O + 36 ATP
Review Videos
• Mr. Anderson Photos. & CR http://www.youtube.com/watch?v=0IJMRsTcwcg