The steps include are

1. Glycolysis: It converts one six-carbon molecule of glucose into two three-carbon molecules of pyruvate.

2. Krebs cycle: It is a series of cycles Krebs (also known as citric acid cycle) which takes in acetyl CoA and produces carbon dioxide, NADH, FADH2, and ATP or GTP

3. ETS and Oxidative phosphorylation. Here, the co-enzymes like NADH can lead to the production of ATP through oxidative phosphorylation.