Oxidative Phosphorylation

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Last updated 2:16 PM on 5/4/26
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4 Terms

1
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Oxidative Phosphorylation

  1. Definition (general)

  2. Where does it occur?

  3. What is the main characteristic of this stage?

  4. What does it create (powers ATP synthase)

  1. Definition: The final major stage of cellular respiration

  2. Happens in the inner mitochondrial membrane

  3. The most ATP is produced in this stage.

  4. Uses energy from NADH to create a concentration gradient which powers ATP synthase

2
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Electron Transport Chain

  1. What does it need to recycle? Why?

  2. How does it do this? (basic)

  3. List its four basic jobs

  1. NADH needs to be recycled back into NAD+ so that earlier stages of cellular respiration can continue.

  2. The electron transport chain recycles NADH by removing its electrons and hydrogens.

  3. (1) Recycle NADH back into NAD+, (2) safely pass electrons on without damaging cell, (3) use energy from those electrons to move hydrogen ions, (4) create a concentration gradient

3
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What is needed at the end of the electron transport chain? Why is it needed?

Oxygen is needed at the end of the ETC in order to accept the hydrogens and electrons, where it then forms water.

4
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  1. How many ATP does oxidative phosphorylation produce?

  2. Is oxidative phosphorylation efficient?

  1. 26-28 ATP per glucose

  2. Yes, it is efficient, cells prefer to use mitochondria when oxygen is available.