1. CELLULAR RESPIRATION Occurs in the MITOCHONDRIA of the cell
Cellular Respiration is : the process that releases energy (exergonic) by breaking down food molecules in the presence of oxygen.
Both Plants and Animals complete cellular respiration.

2. Respiration occurs in all life forms and in all cells.

3. Cellular Respiration
KREBS CYCLE
34 ATP

4. Glycolysis Breaking down Sugar (glucose)
When one molecule of glucose is broken in half, producing pyruvic acid and high energy electrons (NADH)
Occurs in the : Cytoplasm
Requires 2 ATP to start Makes 2 ATP
KREBS CYCLE
34 ATP

5. Krebs Cycle Also called the citric acid cycle Occurs after glycolysis
Occurs in the mitochondria
During the Krebs Cycle, pyruvic acid is broken down into carbon dioxide, and high energy electrons are released.
Creates 2 ATP

6. Cellular Respiration
KREBS CYCLE
34 ATP

7. Electron Transport Chain
Uses high-energy electrons from the Krebs cycle to convert ADP into ATP. Like a stair step.
Electron transport chain creates: 34 ATP
A TOTAL of 38 ATP are formed overall, but 2ATP are used in Glycolysis leaving a net of 36 ATP.

8. Cellular Respiration
KREBS CYCLE
34 ATP

9. Total energy produced by aerobic respiration =
36 ATP

10. AEROBIC Respiration Aerobic = With Oxygen present
Aerobic cellular : respiration with oxygen creates 36 total ATP
WHAT HAPPENS IF THERE IS NO OXYGEN?

11. ANAEROBIC RESPIRATION
Cellular Respiration without oxygen is anaerobic respiration
2 types:
Alcoholic Fermentation: When yeast uses cellular respiration to create alcohol and 2 ATP
Lactic Acid Fermentation: occurs in cells when there is not oxygen, cellular respiration gets stuck in glycolysis only creates 2 ATP. Forms LACTIC ACID build up in muscles.

12. Ethyl Alcohol Anyone?
Used by yeast (unicellular fungus) organisms to make bread, beer, and wine.
Releases Carbon Dioxide that bubbles- causes carbonation in beer & pockets of air in bread
Don’t get excited- the alcohol evaporates as bread bakes (but gives beer & wine its alcohol).
Glucose+4 ADP+4P Ethanol + 2CO2 + 4 ATP

13. Lactic Acid build up makes muscles sore

14. Chemical Pathways Glucose Glycolysis Electron Transport Krebs Cycle
Fermentation (without 0xygen)
Alcohol or lactic acid

15. Comparing Photosynthesis and Cellular Respiration
Function
Energy storage
Energy release
Location
Chloroplasts
Mitochondria
Reactants
CO2 and H2O
C6 H12O6 and O2
Products
C6H12O6 and O2
Equation
6CO2 +6H2O -> C6H12O6+ 6O2
6O2 + C6H12O6-> 6CO2 + 6H2O