PHYSIOLOGY
MUSCLE ENERGETICS GLYCOLYSIS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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It converts back into 3 phospho glceraldehyde
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It doesn’t do anything
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It forms fructose 6 phosphate
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None
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Detailed explanation-1: -The glyceraldehyde 3-phopshate lies directly on the glycolytic pathway and so goes on to stage three. On the other hand, dihydroxyacetone phosphate does not and so needs to be converted into a glyceraldehyde 3-phopshate molecule before it can be used by the glycolytic pathway.
Detailed explanation-2: -DHAP is a precursor to triglycerides, and is used in their synthesis, while G3P is an intermediate in glycolysis, an ATP-producing process. In order to favor the conversion of DHAP into G3P, and not the opposite, the cell must keep G3P levels low (Le Chatelier’s Principle).
Detailed explanation-3: -Glycerol-3-phosphate dehydrogenase (GPDH) is an enzyme that catalyzes the reversible redox conversion of dihydroxyacetone phosphate (a.k.a. glycerone phosphate, outdated) to sn-glycerol 3-phosphate.