Do any energy released in the process of glycolysis? Please answer the question experts

Dear student 
Yes 2 molecules of ATP are released during glycolysis. ATP is the energy currency of cell. 
Glycolysis is the breakdown of glucose to pyruvic acid by partial oxidation. It occurs in the cytoplasm of a cell. The process of glycolysis is explained below:

• A chain of 10 reactions converts glucose into pyruvate.
• Hexokinase: Enzyme that phosphorylates glucose to produce glucose − 6 − phosphate

• 2 ATPs are utilised in two steps:

  • Glucose → Glucose − 6 − phosphate (1 ATP)
  • Fructose − 6 − phosphate → fructose 1, 6 − bisphosphate (1 ATP)
• Fructose 1, 6 bisphosphate splits into glyceraldehyde − 3 − phosphate and dihydroxy acetone phosphate.
• Glyceraldehyde − 3 − phosphate converts into two molecules of 1, 3 bisphosphoglycerate (BPGA), with subsequent conversion of NAD⁺ to NADH + H⁺.

• 4 ATPs are yielded in two steps:

  • BPGA → PGA (1 × 2 = 2 ATPs)
  • Phosphoenol pyruvate → Pyruvic acid (1 × 2 =2 ATPs)
• Net ATPs produced = 4 (produced) − 2 (consumed) = 2 ATPs