Respiration160-page8

Respiration160-page8 - + (with its electrons) (originally...

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Cell Respiration - 8 Oxidation of Pyruvate to Acetyl The two Pyruvate molecules from the original glucose are transported into the inner matrix of the mitochondria by facilitated diffusion Each pyruvate is oxidized releasing H + to reduce NAD + to NADH CO 2 is removed producing Acetyl (A 2-carbon compound) Acetyl combines with Coenzyme A to form Acetyl-CoA, which can enter the Krebs cycle. For one glucose molecule (two pyruvate molecules), we obtain: 2 CO 2 2 NADH 2 Acetyl C0-A Note: When the level of ATP is high in a cell, the cell can convert acetyl-CoA into lipid molecules that can be stored for later energy use. This is one way that excess calories, no matter the nutrient source, are converted to fat. The Krebs Cycle The Krebs cycle is a means to remove energy rich H
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Unformatted text preview: + (with its electrons) (originally part of the glucose molecule) that can subsequently be used to generate ATP in electron transport via chemiosmosis. The leftover carbon is given off as CO 2 . Essentially, the acids of the Krebs cycle are substances that under the right conditions (i.e., The Krebs Cycle) can be oxidized (That is donate H + with its electrons). For each glucose molecule, two ATP are produced in the Krebs cycle by substrate-level phosphorylation, one for each acetyl Co-A molecule that enters the Krebs cycle. (Recall that the glucose molecule has already gone through glycolysis and has been converted to two molecules of Pyruvate in the cytoplasm prior to starting the Krebs cycle.)...
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This note was uploaded on 12/29/2011 for the course BIO 151 taught by Professor Edwards during the Spring '10 term at SUNY Stony Brook.

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