Science question.. Glycolysis?

Question

What is the purpose of the Glycolysis pathway?

What does this reaction need to proceed?

What is produces because of this reaction?

Does it supply energy or store energy?

Answer 1

Guesses

1) To produce pyruvate to be later used in the mitochondrion so that the Kreb's Cycle can begin.

2) I don't get it 100%. But it needs a glucose molecule and ATP.

3) 2 molecules of pyruvate. (net gain of 2 ATP)

4) It uses 2 ATP molecules and produces 4 ATP molecules.