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 - ______ ATP - _____

Cellular Respiration = ______ ATP

FERMENTATION

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

•Method energy production when no O2 present•Allows continual cycling glycolysis to occur & limited amount ATP to be produced