Question

How much ATP does the electron transport chain produce?

Answer 1

Electron Transport Chain:

1. It occurs in both photosynthesis and cellular respiration processes.
2. It takes place in mitochondria.
3. Steps involved in ETS:

• A proton gradient is generated across the mitochondrial membrane.
• In the mitochondrial intermembrane space accumulation of proton takes place.
• Formation of water and reduction of oxygen here, oxygen acts as a terminal electron acceptor.
• Synthesis of ATP takes place by the process of chemiosmosis.
• The synthesis of ATP is catalyzed by the enzyme ATP synthase.

ATP generated through ETS:

1. One molecule of NADH produces 3 molecules of ATP and one molecule of FADH₂ produce 2 molecules of ATP.
2. In ETS 10 NADH molecules are produced while 2 FADH₂ molecules are formed.
3. Therefore, the total ATP generated from these NADH and FADH₂ molecules is 34 molecules.