What is formed at the end of the preparatory phase of glycolysis?
Correct answer: D. Both A and B
- A. G3P
- B. Dihydroxyacetone phosphate
- C. Pyruvate
- D. Both A and B
Explanation
The last step in preparatory phase of glycolysis is the enzymatic splitting of fructose 1,6 -bisphosphate into two fragments. Each of these molecules contains three carbon atoms. One is called 3-phospoglyceraldehyde, 3-PGAL or Glyceraldehyde 3-phosphate (G3P) while the other is dihydroxyacetone phosphate. These two molecules are isomers and in fact, are readily interconverted by yet another enzyme of glycolysis.
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About Bioenergetics
Cellular respiration explains how cells release energy from glucose through glycolysis, the link reaction, Krebs cycle and electron transport chain. It includes ATP production, substrate-level and oxidative phosphorylation, aerobic versus anaerobic respiration, and the roles of mitochondria, oxygen and fermentation in energy transfer.
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