Oxidative Photophosphorylation (electron transport chain)

what type of respiration is oxidative phosphorylation?

aerobic repiration

where does oxidative phosphorylation occur ?

in cristae (folded mitochondria membrane)

how is the cristae adapted ?

folded which increases surface area & means oxidative phosphorylation can occur more rapidly as more carrier proteins so more e- transport chain

how many reduced NADs and reduced FADs are carried into electron transport chain ?

• 10 reduced NADs

• 2 reduced FADs

what happens to the low energy e- & hydrogen ions at the end of oxidative phosphorylation?

low energy e- & H+ ions combine with oxygen to form water

how many ATP does 1 NAD form ?

3 ATP

how many ATP does 1 FAD form ?

2 ATP

how many ATP is formed from oxidative phosphorylation?

34 ATP

How many ATP is produced from one of glucose in aerobic repiration ?

38 ATP

what are the steps of oxidation phosphorylation?

1. hydrogen ions produced during glycolysis & krebscombine with the coenzymes NAD & FAD

2. reduced NAD and reduced FAD donate the e- from the hydrogen ions to the first molecule in the electron transport chain

3. the e- move down the e- transport via a series of oxidation-reduction reactions losing energy as they go

4. this energy used to pump protons from hydrogen ions across the inner membrane space of the mitochondria

5. this builds up a concentration gradient of hydrogen ions & they diffuse back into the matrix via ATP synthase

6. for every H+ion that passses across ATP synthase and ADP & phosphate are joined to make ATP = oxidative phosphorylation

7. oxygen is final e- acceptor & combines with H+ ions to make water