What step in glycolysis produces chemical energy that the cell can use?

Answer

Glycolysis is composed of two main steps:

1. Preparatory phase 
2. Oxidative phase

In preparatory phase ATP is used for decomposition or conversion of glucose into two 3-carbon molecules i.e. glyceraldehyde 3-phosphate and dihydroxy acetone phosphate.
in oxidative phase, when these molecules convert into two pyruvate, ATP is produced.

Conclusion

Thus chemical energy is produced in oxidative phase of glycolysis.

Idont understand i'm sorry

Where are the phrases