Question

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Fermentation of glucose to lactate is an energy yielding process, though it involves no net oxidatione even though the Oxidation of glyceraldehyde-3 phosphate to glycerate is accompanied by the res Pyruvate to lactate and no net accumulation of NADH occurs) Drag the terms on the left to the appropriate blanks on the right to complete the sentences Terms can be used once, more than once, or not at all Reset Help more The oxidation of glyceraldehyde-3-phosphate that occurs atste involves the oxidation group to group, which is a highly reaction. The reduction of pyruvate to lactate but involves the reduction of a group reaction that requires energy an is released by the buidation of group to group carboxylic acid

Answer 1

Oxidation of glyceraldehyde 3 phosphate in glycolysis results in formation of 1, 3 bisphosphoglycerate and involves glyceraldehyde 3 phosphate dehydrogenase. There is formation of 1 NADH2 from NAD+. In this reaction, the carbonyl group (C=O) of aldehyde is oxidized to carboxylic acid. G-3-P has an aldehyde group with carbonyl functional group. Hydroxyl group is not present in aldehyde. This reaction is highly exergonic with release of energy, which is stored in 1, 3 bisphosphoglycerate.

In conversion of pyruvate to lactate, there is oxidation of NADH+ to NAD+. Pyruvate is reduced to lactate. This reaction is exergonic with delta G01= -6 Kcal/mol. The reduction of pyruvate to lactate requires E01= -190 mV. This energy is much less than what is required when G-3-P is oxidized to 1, 3 Bisphosphoglycerate.

Right choice: shown in image below

reaction. The The oxidation of glyceridehyde-3-phosphate tocours at step Cours et sted Gly-6 involves the oxidation stacarbonyl group to a carboxylic acidup, which is a highly Exergonic reduction of bytuvate toate Exergonic but involves the reduction of Carbonyl group hydroxyl group reaction that requires Less n ergy is released by the oxidation of carbonyl group to Carboxylic acid oup