1. Cellular Respiration

2. Cellular Respiration
Cellular Respiration is almost the exact opposite process of photosynthesis.
The reaction for Cellular Respiration follows:
C6H12O6 + H2O → 6CO2 + 6H2O Energy

3. Stages of Cellular Respiration
Stage 1: Glycolysis
Stage 2: Aerobic Respiration

4. Glycolysis Anaerobic Process – does not require oxygen
Glucose is broken down in the cytoplasm
Two molecules of ATP and NADH are formed for each glucose molecule broken down

5. Glycolysis (continued)
The NADH are converted into Pyruvate molecules
Why is the net gain two ATP molecules instead of four in the process?

6. Aerobic Respiration There are two parts of Aerobic Respiration:
Kreb Cycle
Electron Transport

7. Kreb Cycle
Pyruvate reacts with oxygen to give off energy and form carbon dioxide
Also known as the citric acid cycle

8. Electron Transport Where most ATP is produced
High energy electrons and hydrogen ions from the Kreb cycle are used to convert ADP to ATP
What is different for cellular respiration in prokaryotics?

9. Anaerobic Respiration
Respiration in the absence of oxygen
Fermentation – glycolysis in the absence of oxygen
Lactic Acid Fermentation
Alcohol Fermentation

10. Lactic Acid Fermentation
Enzymes convert pyruvate into lactic acid
Occurs in human cells
Used by microorganisms that produce foods (cheese, yogurt, sour cream)

11. Alcohol Fermentation
Pyruvate converted to ethyl alcohol and carbon dioxide
Occurs in yeast and some bacteria