I. Anaerobic respiration- respiration without the use of oxygen
A. Anaerobic- organisms that only use anaerobic respiration to obtain their energy- yeasts
B. partial breakdown of glucose
C. Mechanism1. Glycolysis- splitting of glucose (occurs as the first step in both anaerobic and aerobic respiration)
a) requires 2 ATP as activation energy
b) produces 2 molecules of pyruvic acid for every molecule of glucose
c) produces 4 ATPs - a net gain of 2 ATPs2. Anaerobic respiration - fermentation
a) pyruvic acid is converted to ethyl alcohol and carbon dioxoide (CO2)
b) no ATP produced in this step3. Net equation
C6H12O6 --------> 2 C2H 5OH + 2 CO2 +2 ATP
II. Aerobic respiration - respiration with the use of oxygen
A. Complete breakdown of glucose to carbon dioxide and water with the release of 36 ATPs
B. Mechanism
1. Glycolysis- net 2 ATP
2. Kreb Cycle- pyruvic acid is broken down into carbon dioxide and water and 2 ATPs
a) since there are 2 pyruvic acid produced from glycolosis, 2 turns in the Kreb Cycle are needed
3) Electron transport system- a series of oxidation-reduction reactions in which electrons are transferred from one compound to another
a) 32 ATPs are produced
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