Where in the Cell Does Glycolysis Occur?

1. Glycolysis
2. Krebs cycle
3. Oxidative phosphorylation

Glycolysis is a 10-step process, with each step being catalyzed by a specific enzyme. It does not need oxygen. Glucose (C₆) is broken down to produce two pyruvate (C₃) molecules. In addition, glycolysis results in two NADH molecules and 2 ATP molecules.

The two pyruvate molecules move into a mitochondrian to be converted into acetyl. The rest of cellular respiration takes place in the mitochondrian.