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 Occurs in mitochondria Cycle spins 2x 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 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