Total amount of ATP invested in glycolysis?

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Multiple Choice

Total amount of ATP invested in glycolysis?

Explanation:
Glycolysis starts with an energy-investment phase where two ATP molecules are consumed to activate and commit glucose to the pathway. One ATP is used by hexokinase to convert glucose to glucose-6-phosphate, and another ATP is used by phosphofructokinase-1 to convert fructose-6-phosphate to fructose-1,6-bisphosphate. This priming is necessary for breaking the sugar down and for later steps to efficiently harvest energy. Later in glycolysis, four ATP are produced, giving a net gain of two ATP per glucose, but the amount actually invested is two. So the total ATP invested is two.

Glycolysis starts with an energy-investment phase where two ATP molecules are consumed to activate and commit glucose to the pathway. One ATP is used by hexokinase to convert glucose to glucose-6-phosphate, and another ATP is used by phosphofructokinase-1 to convert fructose-6-phosphate to fructose-1,6-bisphosphate. This priming is necessary for breaking the sugar down and for later steps to efficiently harvest energy. Later in glycolysis, four ATP are produced, giving a net gain of two ATP per glucose, but the amount actually invested is two. So the total ATP invested is two.

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