The ATP formed in the preparatory phase of glycolysis is (are)
Question
The ATP formed in the preparatory phase of glycolysis is (are)
Solution
The ATP formed in the preparatory phase of glycolysis is actually not a net gain. In the preparatory phase, also known as the energy investment phase, 2 ATP molecules are used to phosphorylate glucose and its derivative, fructose-6-phosphate. This investment is necessary to destabilize glucose and make it more reactive for the subsequent steps of glycolysis. The ATP molecules used in this phase are later regenerated in the payoff phase of glycolysis. So, while ATP is formed in the preparatory phase, it is not a net gain for the cell.
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