Big Idea/Question….
This is not Bell Work….please get your notes out
and get ready to “roll”
• How is life as we know it powered?
• PS
• CR
Chapter 4
Cellular Respiration:
Harvesting Chemical Energy
Learning Targets
14. Explain the interrelationship between the
processes of photosynthesis and cellular respiration.
13. Compare and contrast the structure and function
of mitochondria and chloroplasts.
PS vs CR
• Photosynthesis
• Cellular Respiration
PS vs CR
Make a Venn Diagram to compare & contrast
• Photosynthesis
• Cellular Respiration
Function?
Structure?
Structure?
Function?
PS vs CR
• Photosynthesis
• Plants & some bacteria
• Inputs:
• Light energy
• H2O
• CO2
• Outputs:
• O2
• C6H12O6
• Cellular Respiration
• Plants & animals
• Inputs:
• C6H12O6
• O2
• Outputs:
• CO2
• H2O
• ATP
Harvesting Stored Energy
• Organic compounds store energy
between atoms in chemical bonds
• Breaking bonds (catabolism)
liberates energy
• Cellular Respiration  more efficient
process
• Fermentation  partial harvest of
energy
Cellular Respiration
• Glycolysis
• Bridging Process
• Krebs Cycle
• Electron Transport Chain
Learning Targets
4. Explain the Role of NADH, FADH2, and NADPH
2. Identify the inputs and outputs and location of
glycolysis, Krebs & Oxidative phosphorylation
Glycolysis
• Glycolysis  splitting glucose
• Location  cytoplasm
• Anaerobic (no O2 required)
• Utilized by ALL cells
• Steps
• Energy Investment
• Energy Payoff
• Per Glucose
• Produces 2 ATP ( 5 % of available energy)
• 2 NADH
• 2 Pyruvate
• Diagram!
Glycolysis Animation
http://highered.mcgrawhill.com/sites/0072507470/student_view0/chapter25/animation__ho
w_glycolysis_works.html
Bridging (Transition) Process
• Aerobic  requires O2 as final electron acceptor (happens in ETC)
• Location --inside mitochondria “One-Two Punch”
• Carbonyl group released as CO2
• NAD+ reduced to NADH
• Leaves Acetyl--picked up by CoA & becomes Acetyl CoA
• Acetyl CoA intermediate in all catabolism (esp. fats & proteins)
• Surplus of ATP  acetyl-CoA gets stored as lipid
• Little ATP  acetyl-CoA enters Krebs cycle & makes ATP