1.18 Cellular Respiration Pages 77-82

Cellular Respiration glucose + oxygen gas  carbon dioxide + water + ATP energy C 6 H 12 O O 2  6 CO H 2 O + ATP energy

Aerobic Cellular Respiration uses oxygen produces large amounts of ATP

Anaerobic Respiration does not use oxygen produces small amounts of ATP

Step 1: glycolysis Glycolysis: 10 enzyme-catalyzed reactions occur in the cytoplasm One glucose  two molecules of pyruvate Energy released produces 2 ATP

Step 2: oxidative respiration 2 pyruvate move into the matrix of the mitochondrion broken down into 6 CO 2 and 6 H 2 O. Produces 34 molecules of ATP

Mitochondria Site of ATP energy production Mitochondria have their own DNA

Anaerobic Respiration Ethanol fermentation Lacate (lactic acid) fermentation

Ethanol glucose  2 pyruvate + 2 ATP Cytoplasm enzyme “pyruvate decarboxylase” removes CO 2  ethanol

Ethanol Fermentation Beer making Bread making Wine making

Lactate (lactic acid) fermentation Strenuous exercise Glucose  2 pyruvate + 2 ATP  2 lactate Enzyme in cytoplasm “lactate dehydrogenase”

Lactate in muscles Pain Stiffness fatique