Glycolysis

Problem : Where does glycolysis take place in a cell?

Problem : What is the name of the enzyme that catalyzes the phosphorylation of a glucose molecule in the first step of glycolysis?

Problem : In glycolytic steps one and three, what is the source of the phosphate groups that are added to glucose and fructose-6-phosphate, respectively?

Problem : What class of metabolic reaction is catalyzed by phosphoglucose isomerase in the second step of glycolysis? What are the starting and ending molecules in this step?

Problem : In step four of glycolysis, why is dihyroxyacetone phosphate (DHAP) immediately converted into glyceraldehyde-3-phosphate (GAP) by the enzyme triosphosphate isomerase?