1. How is life as we know it powered?
Big Idea/Question….
How is life as we know it powered? PS CR

2. Unit 4 Part 5 Cellular Respiration: Inputs, Outputs & mitochondria

3. Learning Targets
5. Identify the inputs and outputs and location of glycolysis, Krebs cycle, and oxidative phosphorylation. 7. Compare and contrast the structure and function of mitochondria and chloroplasts.

4. Cellular Respiration
Location?

5. Mitochondria Be able to identify: Inner membrane Outer membrane
Cristae
Matrix

6. Cellular Respiration What is it? Who does it? How?.....
Converts potential chemical (glucose) energy into ATP
1 glucose can produce somewhere around 34 ATP molecules!!
Who does it?
Plants, animals and some bacteria
How?.....

7. Cellular respiration The process: Reactants (inputs): Glucose & Oxygen
Products (Outputs): CO2, H2O & ATP

8. Learning Check
What are some similarities between mitochondria and chloroplasts?
Where does Cellular respiration occur?
What are the inputs for CR?
What are the outputs for CR?

9. Unit 4 Cell Energetics
Part 6 Glycolysis, Bridging Process, the Krebs Cycle/Citric Acid Cycle & Oxidative phosphorylation

10. Learning Targets
5. Identify the inputs and outputs and location of glycolysis, Krebs cycle, and oxidative phosphorylation.

11. Electron Carriers in CR
NAD+  NADH
FAD+  FADH2

12. Cellular Respiration Glycolysis Bridging Process Krebs Cycle
Electron Transport Chain

13. 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

14. Glycolysis Animation

15. Now what??

17. 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
Surplus of ATP  acetyl-CoA gets stored as lipid
Little ATP  acetyl-CoA enters Krebs cycle & makes ATP

19. Krebs Cycle aka Citric Acid Cycle
Location--Matrix of mitochondria
Aerobic  requires O2 as final e- acceptor
Produces:
CO2 (from carbonyl)
NADH
FADH2
ATP

21. Electron Transport Chain
Location--Membrane of cristae
Aerobic  requires O2 (final electron acceptor)
Follow the electrons—and protons!
Animation
vcell.ndsu.nodak.edu/animations/etc/first.htm

22. Oxidative Phosphorylation
Electrons power proton pumps (which are imbedded proteins)  pump H+ into intermembrane space (ETC)
Generates ATP when H+ diffuse back into matrix thru ATP Synthase (Chemiosmosis)
NAD+ powers 3 pumps  3 ATP
FAD+ powers 2 pumps  2 ATP

23. Oxidative Phosphorylation
e- transferred to oxygen through proton pumps  builds up proton gradient
Generates ATP through ATP Synthase

25. Learning Checks
What are the 4 parts of Cellular Respiration, and where are they located?
Mitochondria transfer _____________ energy from ________ to ATP; chloroplasts transform ___________energy into the chemical energy.