Big Idea/Question….

• How is life as we know it powered?• PS• CR

This is not Bell Work….please get your notes out and get ready to “roll”

Chapter 4Cellular 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

• Photosynthesis • Cellular RespirationMake a Venn Diagram to compare & contrast

Function? Function?Structure? Structure?

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

Make a table!! Make a table!!

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__how_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