1. Glycolysis is the first stage of respiration.
2. It occurs in the cytoplasm of the cell. Hence it is also called cytoplasmic respiration.
3. This process does not require oxygen.
4. The amount of energy produced in this process is less.
5. CO2 is not produced at this stage.
6. In this process partial oxidation of respiratory material (glucose) takes place.
7. This process is called EMP trajectory.