CELLULAR RESPIRATION
TERMINOLOGY
• Aerobes – require oxygen to make energy
– Most plants, animals & some bacteria
– Staphylococcus
• Anaerobes – not require oxygen to make energy
– Some fungi & bacteria (for some O2 can be toxic )
– Tetanus
• Facultative Anaerobes – function w/ or w/o O2
– Yeast
– Listeria
RESPIRATION vs. Fermentation
C6H12O6 + O2 ---------> CO2 + H2O
C6H12O6 ---------> CO2 + C2H6O
C6H12O6 ---------> C3H6O3
GLYCOLYSIS
• Anaerobic – no O2
• Occurs in cytoplasm
• All cells use this
process
– Prokaryotic
– Eukaryotic
• Products:
– NADH
– ATP
– Pyruvate
Conversion of Pyruvate  Acetyl CoA
• Aerobic – O2 needed
– Bonds w/ C form CO2
• Occurs in mitochondria
• Repeated 2x (each
molecule glucose makes
2 pyruvates)
• Products:
– NADH
– CO2
– Acetyl CoA
KREBS CYCLE
• Aerobic – O2 needed
– Bonds w/ C form CO2
• Occurs in mitochondria
• Cycle spins 2x
• Products:
– CO2
– NADH
– FADH2
– ATP
ELECTRON TRANSPORT CHAIN
• Aerobic – O2 needed
– Binds w/ H2 to form
water
• Occurs in cristae
(inner mito. Folds)
• Convert all energy
molecules into ATP
• NADH (gly) x 2 = ___
• NADH (kc) x 3 = ___
• FADH x 2 = ___
TOTAL ENERGY PRODUCTION
ATP - _____
ATP - ______
Cellular Respiration = ______ ATP
ATP - _____
FERMENTATION
•Method energy production when no O2 present
•Allows continual cycling glycolysis to occur & limited
amount ATP to be produced
Alcoholic Fermentation
• Occurs in yeast & bacteria
• By-products - CO2 &
alcohol
• Commercial uses
– Baking
– brewing
Lactic Acid Fermentation
• Occurs large muscles,
fungi & bacteria
• By-products – lactate
– Pain, burning assoc w/
strenuous exercise
• Commercial uses
– Yogurt
– Cheese