oxidative phosphorylation

• where does oxidative phosphorylation occur?

  inner mitochondrial membrane
• where does oxidative phosphorylation specifically occur?

  across the cristae
• what stage of aerobic respiration is the oxidative phosphorylation ?

  4
• what is the first stage of oxidative phosphorylation?

  1. hydrogen is released from the reduced coenzymes - NADH and FADH
• what is the second stage of oxidative phosphorylation?

  2. in each H atom, the high energy electron leaves the electron shell, to leave H+
• in the second stage what is hydrogen split into?

  •a high energy electron (e-)

  •a proton (H+)
• what is the third stage of oxidative phosphorylation?

  The electrons enter the electron transport chain
• what is an electron transport chain?

  A series of molecules that transfers electrons from molecule to molecule by chemical reactions
• what is the result of the third stage of oxidative phosphorylation?

  This gives the carrier proteins the energy they need to actively transport the H+ across the membrane into the inter membrane space
• what gradient is set up?

  electrochemical gradient
• what will occur due to the electrochemical gradient?

  H+ will move down the gradient
• how does the H+ move down the gradient?

  the ATP synthase provides a channel for the H+ to move through (back into the matrix)
• what does the movement of the H+ result in?

  As they move through the ATP synthase, this powers it to produce ATP.

  This is called chemiosmosis
• what is the final electron acceptor molecule in the electron transfer chain?

  oxygen
• what happens to the final oxygen?

  it is reduced by H+ to form water
• what is the equation on how water is produced?

  1/2O2 + 2e- + 2H+ > H2O