Chpater 9

Chpater 9 - Chpater 9 Glycolysis and Fermentation...

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Chpater 9 Glycolysis and Fermentation Glycolysis is the first part of the cellular respiration or aerobic respiration, specifically it is the breakdown of the 6C glucose molecule to 2, 3 Carbon molecule called pyurvate with 2 net production of ATPs. Because Kreb’s cycle and electron transport chain is aerobic—needs oxygen to proceed, sometimes when there is no oxygen left from the glycolysis it goes through the step called fermentation to regenerate NAD+ or Oxygen. Glycolysis can occur by it self—on the other hand Krab’s cycle and electron transport chain occur together. Chemical bond energy—is the type of potential energy we store in our cells (ATP) Breakage of one of the two Phosphoanhydride bonds releases one of the phosphate group—very exergonic reaction and releases about -7.3 Kcal/mol. Anhydride bond releases more energy than the ester bond because, of the resonance structure of the molecule. Breaking of a bond requires energy, but when you break a bond you are also creating more bonds that release energy.
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You cannot make ATP with the molecule with lower energy, like Glycerol phosphate or Glucose-6-phosphate and Glucose-1-phosphate. But you can make ATP with molecule that has higher energy than itself like, PEP, 1,3-bisphosphoglycerate. In contrast, ATP can phosphorylate Glucose 1-phosphate but, it cannot phosphorylate PEP which has higher energy. As you can see from the image that PEP has the highest negative free energy and Glycerol phosphate has the lowest. There are various uses of ATP in our cells. ATP has the same usage under both anaerobic and aerobic condition in our cell just the way of getting to use (process) ATP is different. Oxidation and Reduction OIL RIG OIL oxidation is loss of electrons RIG reduction is gain of electrons You can’t have one without the other. If something is oxidized or loose electrons, something has to be reduced or gain electrons. Reducing agent something that is donating the electron, giving the electron to something else. Oxidizing agent
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This note was uploaded on 11/17/2010 for the course BIO 205 taught by Professor G during the Spring '10 term at WPUNJ.

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Chpater 9 - Chpater 9 Glycolysis and Fermentation...

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