Week six- Cellular oxidation Flashcards
What is the propose of cellular oxidation?
Provides energy to re-synthesise ATP in the presence of O2
How does cellular oxidation provide energy to re-synthesis ATP?
Breakdown of CHO, lipid and protein
What is oxidation?
Giving up electrons
What is reduction
Gaining electrons
What are the co-enzymes involved?
NAD and FAD
Energy transfer during the ETC.
In three of the four cytochromes the free energy release of electron transfer is associated with what?
‘Proton pumping’ from the matrix to the intermembranous space
Energy transfer during the ETC.
Where do the protons accumulate?
Outside the mitochondrial matrix (cytosolic side)
Energy transfer during the ETC.
What happens when the protons flow back down their concentration gradient into the matrix?
Sufficient energy is release to phosphorylate ADP—>ATP
How much ATP does each pair of protons produce from NAD?
3 ATP
How much ATP does each pair of protons produce from FAD?
2 ATP
Why is food broken down?
For it’s electrons
What allows ATP resynthesis?
electron transfer and proton pumping
What must be present to accept electron at the end of the ETC?
Oxygen
Why is cellular oxidation important?
- A cells primary means of extracting and trapping chemical energy.
- 90% of ATP synthesis takes place via oxidative reaction
Where does cellular oxidation occur?
In the inner lining of mitochondria
