1. Chapter 9: Cellular Respiration
AP Biology
Chapter 9:
Cellular Respiration

2. powers most cellular work
LE 9-2
Light
energy
ECOSYSTEM
Photosynthesis
in chloroplasts
CO2 + H2O
Organic
molecules
+ O2
Cellular respiration
in mitochondria
ATP
powers most cellular work
Heat
energy

3. Cellular Energy

4. ATP Structure

5. Phosphorylation using Free energy

6. Methane (reducing agent) Oxygen (oxidizing agent) Carbon dioxide Water
LE 9-3
Reactants
Products
becomes oxidized
CH4 +
2 O2
CO2 +
Energy +
2 H2O
becomes reduced H H C H O O O C O H O H H
Methane
(reducing
agent)
Oxygen
(oxidizing
agent)
Carbon dioxide
Water

7. Electron Transport Chain is is ALWAYS located on a membrane

8. Oxygen is at the end

9. Process of Cellular Respiration

10. Energy Investment Phase

11. Energy Payoff Phase

12. LE 9-10
CYTOSOL
MITOCHONDRION
NAD+
NADH
+ H+
Acetyl Co A
Pyruvate
CO2
Coenzyme A
Transport protein

13. Fig: 9.12 Kreb’s Cycle Simplified

14. Actual Kreb’s Cycle

15. Electron Transport Chain is located on the inner FOLDED membrane

16. Electron Transport Chain (Proteins are H+ Pumps)

17. Pumping H+ into a confined space

18. LE 9-15 Inner mitochondrial membrane H+ H+ H+ H+ Protein complex
Citric
acid
cycle
Oxidative
phosphorylation:
electron transport
and chemiosmosis
Glycolysis
ATP
ATP
ATP H+ H+ H+ H+
Protein complex
of electron
carriers
Cyt c
Intermembrane
space Q IV I
III
ATP
synthase
Inner
mitochondrial
membrane II
2H+ + 1/2 O2
H2O
FADH2
FAD
NADH
+ H+
NAD+
ADP + P
ATP i
(carrying electrons
from food) H+
Mitochondrial
matrix
Electron transport chain
Electron transport and pumping of protons (H+),
Which create an H+ gradient across the membrane
Chemiosmosis
ATP synthesis powered by the flow
of H+ back across the membrane
Oxidative phosphorylation

19. Fig: 9.14 ATP Synthetase Complex

20. Is Oxygen present?

21. Fig: 9.17a Alcohol Fermentation

22. Fig: 9.17b Lactic Acid Fermentation

23. Carbohydrates Fats Amino acids Sugars Glycerol Fatty acids Glycolysis
LE 9-19
Proteins
Carbohydrates
Fats
Amino
acids
Sugars
Glycerol
Fatty
acids
Glycolysis
Glucose
Glyceraldehyde-3- P
NH3
Pyruvate
Acetyl CoA
Citric
acid
cycle
Oxidative
phosphorylation

24. LE 5-UN78
a carbon
Amino
group
Carboxyl
group

25. Fat molecule (triacylglycerol)
LE 5-11b
Ester linkage
Fat molecule (triacylglycerol)

26. Negative Feedback

27. Phosphofructokinase (Puts on the SECOND ATP)