Question

Describe the location and basic steps of the electron transport system, including it's products.

Answer 1

In aerobic respiration electron transport chain is the last stage. And it is located in the inner mitochondrial membrane, it is arranged in folds to increase the inner surface area used to transport chain.

The chain mainly releases the energy stored in within the reduced hydrogen carbons in order to synthesise the ATP, this called oxidative phosphorylation

There are three steps in electron transport chain

1.generating a electro chemical gradient

2.ATP synthesis

3. Reduction of oxygen.

1. Generating a electro chemical gradient: NADH and FADH2 are the hydrogen carriers are oxidized and release the high energy electrons and protons ant it is transferred to electron transport chain. Electrons are pass through the chain they lose energy which is used by the chain to pump protons ( H+) ions. The protons are create a electro chemical gradient.

2. ATP synthesis: these electro chemical gradient will cause move H+ ions move down to the membrane and diffuse back to the matrix. The diffusion of protons is called chemioosmosis. And it is facilitated by the transmembrane enzyme ATP synthase. This enzyme is used for synthesis of ATP.

3. Reduction of oxygen: in this first deenergised electrons must be removed.oxygen is used to prevent the becoming blocked chain. oxygen bind with free proton in the matrix to form water.

In the absence of oxygen cannot transfer deenergised electrons and could not form ATP