How is life as we know it powered? 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

Make a Venn Diagram to compare & contrast PS vs CR Make a Venn Diagram to compare & contrast Cellular Respiration Photosynthesis Function? Function? Structure? Structure?

PS vs CR Photosynthesis Inputs: Outputs: Cellular Respiration Inputs: Make a table!! Make a table!! 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.mcgraw- hill.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