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Unformatted text preview: 1. Glycolysis 2. Krebs Cycle 3. Electron transport There are 2 stages in energy transfer in anaerobic cells (or in aerobic cells in the absence of CO 2 ) 1. Glycoysis 2. Fermentation Glycolysis 1 st stage in the energy releasing pathway. It occurs in the cytoplasm of the cell. It occurs in both aerobic and anaerobic organisms. Pyruvate can follow 3 different pathways: 1. Alcoholic fermentation 2. Lactate fermentation 3. Aerobic respiration. The pathway used in determined by the type of organism and by the amount of oxygen available. Fermentations No oxygen is used. The product of fermentation accepts the electrons released during glycolysis. THE REASON THAT THESE ELECTRONS HAVE TO BE "DEALT WITH" IS THAT THERE IS ONLY A LIMITED AMOUNT OF THE ELECTRON CARRYING MOLECULES (NAD+) THEY HAVE TO BE RECYCLED FOR GLYCOLYSIS TO CONTINUE....
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- Spring '99