Summary:
- The first stage of cellular respiration is glycolysis.
- It does not require oxygen, and it does not take place in the mitochondrion.
- Enzymes split a molecule of glucose into two molecules of pyruvate.
- This releases energy, which is transferred to ATP.
- During this stage, high-energy electrons are also transferred to molecules of NADH.
- NADH is used in stage III to make more ATP.
- The energy to split glucose is provided by two molecules.
- of ATP.
- This is the most fundamental and primitive pathway for making ATP.