Question

Why are 4 ATP produced in glycolysis?

Answer 1

Production of ATP in glycolysis:

1. Glycolysis is the process through which glucose breaks down into 2 molecules of pyruvate and releases energy in the form of ATP.
2. It is the first step of cellular respiration.
3. First ATP is produced when glyceraldehyde-3-phosphate ⇢ 1,3 diphosphoglycerate.
4. Secondly ATP is produced when phosphoenolpyruvate ⇢ pyruvate.
5. These reactions occur twice for both molecules of 3-phosphate.
6. Thus, a total of 4 ATPs are produced during glycolysis.