1. Let’s recall Photosynthesis!

2. Photosynthesis Explain the diagram below.

3. Which organelle in the plant cell performs photosynthesis?

4. Which organelle in the plant cell performs photosynthesis?
Chloroplast

5. Cellular Respiration –process that releases energy by breaking down glucose and other food molecules in the presence of oxygen
+ ENERGY

6. Where in the cell does cellular respiration take place?
The Mighty Mitochondria!

7. What type of cells undergo respiration?
Plant Cells?
Animal Cells?
Can both cell types photosynthesize?
Why? Why not?

8. Cellular Respiration

9. Cellular Respiration Process
Step 1 – GLYCOLYSIS - occurs in the cytoplasm
Glucose is broken down releasing 2 ATPs (energy) and 2 Pyruvic acids.
Aerobic or anaerobic?

10. Step 2 – Kreb’s Cycle – occurs in the mitochondria
Carbon coming off – needs oxygen to produce the carbon dioxide. We call this Aerobic Respiration – meaning with oxygen
Krebs cycle produces 2 ATPs (energy)
Aerobic or anaerobic?

11. Step 3 – Electron Transport Chain
This occurs in the mitochondria also.
The electron transport chain uses the high-energy electrons from the Krebs cycle to convert ADP into ATP.
Aerobic or anaerobic?

12. Anaerobic Respiration
Without Oxygen
Two Kinds:
1. Alcoholic Fermentation
2. Lactic Acid Fermentation

13. What is Fermentation?
Fermentation releases energy from food molecules by producing ATP in the absence of oxygen.

14. Alcoholic Fermentation
Pyruvic acid makes alcohol as a waste product in producing energy – yeast and some bacteria do this.

15. Lactic Acid Fermentation
Pyruvic acid produces Lactic acid and energy – This happens when a cell accumulates lots of pyruvic acid from glycolysis – too much before it can get to the Kreb’s cycle. Oftentimes this happens to athletes when they begin to work out – creating a burning sensation in the muscles.