1. Unit 4: Cellular Respiration and Photosynthesis
Concept 1: Analyzing the Processes of Cellular Respiration.
Refer to pg in Holtzclaw, Ch 9 in Campbell and media resources
Refer to pg in Holtzclaw, Lab 5 in LabBench

2. Try This! Are these statements true or false?
Photosynthesis is the plant’s form of cellular respiration.
Plants respire only when they don’t photosynthesize.
Cellular respiration takes place only in plant roots, not throughout the plant.

3. Try This! ALL OF THESE ARE FALSE!
Photosynthesis is the plant’s form of cellular respiration. FALSE
Plants respire only when they don’t photosynthesize. FALSE
Cellular respiration takes place only in plant roots, not throughout the plant. FALSE

4. How is cellular metabolism relevant to higher levels of biological organization: physiology (breathing, digestion), ecology (communities)?

5. How is cellular metabolism relevant to higher levels of biological organization: physiology (breathing, digestion), ecology (communities)?

6. The Big Picture… Cellular Respiration Catabolic Exergonic
Breaks down complex molecules into smaller ones
Exergonic
Releases energy that can be used to do work (such as build ATP from ADP and Pi)

7. The Big Picture… Cellular Respiration
If you released all of the energy in sugar at once, what would happen?
Quick combustion! FIRE
Example: Marshmellows on Fire

8. The Big Picture… Cellular Respiration
Instead, your mitochondria use a series of controlled steps, releasing energy in small amounts at a time
Some energy still lost as heat
The rest is converted to chemical energy in ATP for use in the cell!
HOW?????

9. Background Info… Reduction/Oxidation Reactions
Redox Reactions!
Follows the movement of ELECTRONS from one chemical to another
“X” is losing electrons
“Y” is gaining electrons

10. Background Info… Reduction/Oxidation Reactions
Redox Reactions!
Lose Electrons, Oxidize
Gain Electrons, Reduce
LEO the lion says GER 

11. Background Info… Reduction/Oxidation Reactions
Redox Reactions!
Classic Chemistry Example…

12. Background Info… Reduction/Oxidation Reactions
Redox Reactions!
Cellular Respiration…
Do you have any ideas as to how you can harness the movement of electrons to split up cellular respiration into steps??

13. Electron Carriers! Introducing…NAD+, a coenzyme electron carrier
NAD+ + 2e - + H + produces NADH
Is NAD+ reduced or oxidized?

14. Electron Carriers! Introducing…NAD+, a coenzyme electron carrier
NAD+ + 2e - + H + produces NADH
Gain Electrons Reduce
LEO the lion says GER 

15. Electron Carriers! Also…FAD, a coenzyme electron carrier
FAD + 2e - + 2H + produces FADH2
Gain Electrons Reduce
LEO the lion says GER 

16. An Overview Cellular respiration has three stages:
Glycolysis (breaks down glucose into two molecules of pyruvate)
The citric acid cycle (completes the breakdown of glucose)
Oxidative phosphorylation (accounts for most of the ATP synthesis)

17. An Overview

18. An Overview

19. An Overview

20. An Overview

21. An Overview

22. C6H12O6 + 6 O2  6 CO2 + 6 H2O + Energy (ATP + heat) Where can you find all of these reactants/products?
To Prepare…
Finish Comparison Chart
Try Animations and Bioflix!
Think of Project Ideas…

23. You must know…
The role of glycolysis in oxidizing glucose to two molecules of pyruvate
The process that brings pyruvate from the cytosol into the mitochondria and introduces it into the citric acid cycle
How the process of chemiosmosis utilizes the electrons from NADH and FADH2 to produce ATP
The difference between fermentation and cellular respiration