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The glycolysis pathway involves 10 unique steps that sequentially convert a single glucose molecule to two pyruvate molecules.

Within that metabolism pathway, there is one particularly important step that contributes to the high-efficiency output.

Choose the statement that explains the observed efficiency in the glycolysis cycle.


Fructose bisphosphate aldolase is most essential as it breaks up fructose-1,6-bisphosphate into two 3-carbon molecules: Glyceraldehdye-3-phosphate and dihydroxyacetone phosphate.


Triose phosphate isomerase is most essential as it converts dihydroxyacetone phosphate to glyceraldehdye-3-phosphate.


Glyceraldehyde-3-phosphate dehydrogenase is most essential as it adds a second phosphate group to glyceraldehdye-3-phosphate to eventually release two ATP molecules downstream.


Phosphofructokinase is most essential as it utilizes an ATP to add a second phosphate group to fructose-6-phosphate allowing for the downstream release of two phosphate-group-containing molecules via fructose bisphosphate aldolase.

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