Electron-transport system take place in which part of mitochondria?

✅ Explanation: The electron transport chain (ETC), a crucial part of cellular respiration, is located in the inner mitochondrial membrane. This membrane is highly folded, forming structures called cristae, which increase the surface area available for the ETC components. The ETC consists of a series of protein complexes and electron carriers that facilitate the transfer of electrons from NADH and FADH₂ to molecular oxygen, ultimately producing ATP.

🔑Key Points :

• Electron Transport System (ETS):
-ETS is the third step during aerobic respiration. It involves the formation of water molecules and energy molecules (ATP).
-ETS takes place in the inner mitochondrial membrane.
-NADH2 and FADH2 produced during the initial steps of aerobic respiration – glycolysis, connecting link reaction, and Krebs cycle- are oxidized in ETS with the help of various electron carriers and enzymes.
-The energy-rich molecules – ATP – are synthesized with the help of energy released during the oxidation of NADH2 and FADH2. This process is called oxidative phosphorylation.
-The enzyme involved in the synthesis of ATP is ATP synthase. This enzyme is located in the inner mitochondrial membrane.