1. Cellular Respiration
Ch.7

4. (7-1) Cellular Respiration
Series of complex rxns that converts organic cmpds into usable E (ATP – adenosine triphosphate)
Used by heterotrophs & autotrophs

6. Overview C6H12O6 + 6O2  6CO2+ 6H2O + ATP 2 stages:
Exact opposite of photosynthesis
2 stages:
Glycolysis
Anaerobic: no O2 present
Aerobic Respiration
Aerobic: O2 present

7. Glycolysis Glucose is broken down into pyruvic acid (pyruvate) & NADH
Location: cytosol
Purpose: make reactants for the next step & a little E (net = 2 ATP)

9. Then What? Pyruvic Acid & NADH No oxygen Oxygen
Fermentation Aerobic Respiration

10. Fermentation 2 types: Purpose: make E to keep glycolysis running
Lactic acid
Alcoholic
Purpose: make E to keep glycolysis running

11. Lactic Acid Fermentation
Makes lactic acid & a little E
Muscle cells will use this path during strenuous workouts & cause muscle soreness

12. Alcoholic Fermentation
Makes ethyl alcohol, CO2 & a little E
Fermentation of yeasts is used for the production of beers, wines, & breads

14. (7-2) Aerobic Respiration
Pyruvic acid & NADH is used to make a large amt. of ATP
Occurs after glycolysis when oxygen is present
Location: mitochondrial matrix
2 stages:
Krebs Cycle
e- Transport Chain
(ETC)

15. Krebs Cycle Glucose is broken down to make CO2 & 2 ATPs
NADH & FADH2 made to
drive next stage

16. ETC
Series of molecules in the inner mitochondial membrane that transfers e- from 1 to another
ATP’s produced through chemiosmosis
Most E in cellular
resp. is formed
here (32-34 ATPs)

17. Chemiosmosis
Making of ATP using a chemical conc. gradient of H+ ions across a membrane via the protein ATP synthase