AP Bio Chapter 7 Unit 3: Introduction to Metabolism

Aerobic respiration

Aerobic respiration

Consumes organic molecules and oxygen; yields ATP

Anaerobic respiration

Consumes organic molecules and compounds other than oxygen; yields ATP

Cellular respiration

includes BOTH aerobic and anaerobic; often used to refer to aerobic

Fermentation

Alcoholic fermentation

Redox reactions

Chemical reactions that transfer electrons between reactants

Oxidation

Substance loses electrons

Ex. NADH —> NAD+; FADH2 —> FAD+

Reduction

Substance gains electrons

Ex. NAD+ —> NADH; FAD+ —> FADH2

Reducing agent

Electron donor

Ex. Hydrogen

Oxidizing agent

Electron acceptor

Ex. Oxygen

Glycolysis

PFK

G3P

Citric acid/Krebs Cycle

Oxaloacetate

Electron transport chain

ATP synthase

Chemiosmosis

Cytochromes

Proton motive force

Substrate-level phosphorylation

Oxidative phosphorylation

Lactic acid fermentation

Obligate anaerobes

Facultative anaerobes

Products of glycolysis

4ATP (net 2), 2NADH or FADH2, 2H2O

Products of cellular respiration

Products of Krebs Cycle

2ATP, 6NADH, 2FADH2, 4CO2

Inter-Krebs cycle

Products of inter-krebs

2NADH (per glucose molecule), most likely 2FADH2, 2CO2

Products of electron transport chain

29-34 ATP, H2O