1. Basic Process of Photosynthesis:
Sun
LIGHT

2. Basic Process of Photosynthesis:
CO2
Sun
LIGHT
Light Dependent Reactions
Calvin Cycle
CHRLORPLAST O2
Sugars

4. Chemical Pathways Living things get the energy they need from food
Both plant & animal cells carry out final stages of cellular respiration

5. …Remember “ATP”?
ATP stores energy for cell activities like active transport & movement within the cell

6. EQUATION FOR
CELLULAR RESPIRATION

7. EQUATION FOR CELLULAR RESPIRATION
It's
Photosynthesis
Backwards!!!
EQUATION FOR
CELLULAR RESPIRATION

8. Cellular Respiration…
Process that releases energy by breaking down glucose & other food molecules in the presence of oxygen
Three Stages:
Glycolysis
Krebs Cycle
Electron Transport Chain

9. GLYCOLYSIS
Breaks down “Glucose” (6-carbon sugar) into molecules of “Pyruvic Acid” (3-carbon compound)
The products are:
2 Pyruvic Acid molecules
2 ATP molecules
2 NADH molecules

10. Glycolysis has 2 pathways…
If Oxygen is present (Aerobic) ...“Krebs Cycle”… then to Electron Transport Chain
If Oxygen is absent (Anaerobic) … “Fermentation”… (directly to Electron Transport Chain)

11. FERMENTATION (Aanerobic Pathway)
2 TYPES: Alcoholic & Lactic Acid
Alcoholic :
Yeast & other microorganisms use this to produce alcohol & CO2 as wastes.
Beer is a beverage made by alcoholic fermentation

12. FERMENTATION (Aanerobic Pathway)
Lactic Acid:
Exercise causes the body needs more oxygen for respiration to make more ATP
Body resorts to lactic acid fermentation to make ATP
Lactic Acid is also produced causing burning sensation in muscles

13. Glycolysis has 2 pathways…
If Oxygen is present (Aerobic) ...“Krebs Cycle”… then to Electron Transport Chain
If Oxygen is absent (Anaerobic) … “Fermentation”… (directly to Electron Transport Chain)

14. KREBS CYCLE (Aerobic Pathway)
Hans Kreb:
SEE P.226
Discovered citric acid cycle, “Krebs Cycle”
Pyruvic Acid is broken down into CO2 in a series of energy extracting reactions

15. ELECTRON TRANSPORT CHAIN
Uses high energy electrons from the Krebs Cycle to convert ADP to ATP!!!
O2 is the final electron acceptor in the electron transport chain

16. Cellular Respiration…
Process that releases energy by breaking down glucose & other food molecules in the presence of oxygen
Glycolysis sets
the stage for
Cellular Respiration
Two Stages:
Krebs Cycle
Electron Transport Chain

17. Cellular Respiration Mini-Lab
Clear your desk (except for pencil or pen)
Write the title above on notebook paper
Complete the Mini-lab (procedures & observations)
Answer the questions on both sides
Turn-in work to class basket when you finish
(we will discuss it in class)
You Have 15 min.!!!