1. 1. What is carbon fixation and why is it important to all heterotrophs?
2. Where do the light and dark reactions occur in:
C3 photosynthesis?
C4 photosynthesis?
CAM photosynthesis?

2. Cellular Respiration
Chapter 8
GTCHS Biology

3. Metabolic Reactions of Living Organisms
SUN
RADIANT ENERGY
CELL
ACTIVITIES
PHOTOSYNTHESIS
RESPIRATION
GLUCOSE
ATP(ENERGY)

4. 1. What is photosynthesis?
A chemical reaction in which light energy is converted to chemical energy in glucose
The most important chemical reaction occurring on the planet!
How we consumers get all of our food and energy!!

5. So plants use energy to make glucose…
We break down glucose to get energy!!!!

6. Cellular Respiration Basically the opposite of photosynthesis
The process by which our mitochondria break down glucose to make ATP
Chemical equation for aerobic respiration:
C6H12O6 + O2  CO2 + H2O + chemical energy
(glucose) + (oxygen)  (carbon dioxide) + (water) + (ATP)

7. Cellular Respiration

8. Cellular Respiration

9. Cellular Respiration Steps of aerobic respiration:
Glycolysis: First step breaks down glucose into pyruvate
1.5. (Intermediate step: Convert Pyruvate to Acetyl CoA)
2. Krebs Cycle/Citric Acid Cycle: Second step uses the Acetyl CoA to harness electrons for the next step of respiration
3. Electron transport: Third step uses the electrons and H+ ions to make a lot of ATP

10. Cellular Respiration – 1. Gylcolysis

11. Cellular Respiration – 1.5 Intermediate Step

12. Cellular Respiration – 2. Citric Acid Cycle (Krebs Cycle)

13. Cellular Respiration – 3. Electron Transport Chain
That we use for energy! 32

14. Anaerobic Respiration
1. Lactic Acid Fermentation: Pyruvate  Lactic Acid

15. Anaerobic Respiration
1. Alcoholic Fermentation: Pyruvate  Ethyl Alcohol